Non Spin/HSFClub Certificate2025
SUPERCIUKITA-561M24
FEDERAZIONE ITALIANA VELA
Distr.:UVAI  www.uvai.it
Tel. + 39068841273
E-mail  segreteria@uvai.it
Rated boat velocities in knots
Wind Velocity 4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Beat Angles43.3°43.3°40.9°38.7°37.8°37.6°37.7°38.0°39.5°
Beat VMG2.473.414.144.614.764.834.864.914.81
52°3.935.236.096.556.796.937.037.167.12
60°4.245.516.296.807.127.307.447.627.64
75°4.425.706.437.027.607.938.198.538.73
90°4.305.596.387.017.728.478.979.6710.15
110°3.614.986.026.667.338.219.1911.0012.34
120°3.274.645.756.447.057.788.7211.0913.67
135°2.763.995.105.976.557.147.839.5812.60
150°2.293.354.365.265.996.507.038.309.94
Run VMG1.972.913.814.695.496.136.637.779.22
Gybe Angles145.3°145.3°173.9°175.5°176.6°178.1°178.4°177.3°175.7°
APH ToD:593.5CDL: 7.526APH ToT: 1.0109CertNo:24/1
BOAT
ClassMelges 24DesignerReichel/PughBuilderDevoti SailingAge dateSeries date12/1992Offset fileMELG24.OD.offData file561M24
HULL
Length Overall7.509 mMaximum Beam2.490 mDraft1.525 mDisplacement821 kgDLR2.7391IMS DivisionSportboatDynamic Allowance0.090%Age Allowance0.487%
PROPELLER
InstallationNo PropellerTypeN/ADiameterN/A
CREW
Maximum weight375 kg(declared)Minimum weight245 kg ✱ when appliedNon Manual PowerNoCrew Arm ExtensionLoose or no lifelines
SAIL AREAS (m²)
MeasuredRatedMainsail21.3822.33Headsail Luffed12.1312.13Headsail FlyingSymmetricAsymmetric
STORM SAIL AREAS (m²)
Trysail5.87Storm Jib3.72Heavy Weather Jib10.04
SAIL LIMITS
Headsails5
✱ Zero set flying
Spinnakers0
✱ No spinnaker pole aboard
STABILITY
Righting MomentN/AStability IndexN/A
The owner and any other person in charge is responsible that boat is complying with her certificate in accordance with RRS 78.1 and ORC Rule 304.
Non Spin/HSFClub Certificate2025
SUPERCIUKITA-561M24
FEDERAZIONE ITALIANA VELA
Distr.:UVAI  www.uvai.it
Tel. + 39068841273
E-mail  segreteria@uvai.it
Time Allowances in secs/NM
Wind Velocity 4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Beat VMG1455.21055.2869.3781.6756.0745.2740.0733.2748.8
52°917.0688.7591.3549.5530.5519.6512.2503.1505.7
60°849.3652.8572.6529.8505.7493.0483.7472.6471.1
75°814.2632.1559.8513.2473.6454.1439.7422.0412.2
90°837.5643.9563.9513.7466.6424.8401.4372.5354.6
110°997.9722.8598.0540.6491.1438.6391.6327.2291.6
120°1099.3775.9625.7559.1510.7462.7413.0324.6263.3
135°1306.6902.6705.5602.6549.7504.3459.6375.7285.7
150°1570.21073.2826.6684.2600.9553.5512.2433.5362.3
Run VMG1826.21239.3945.4768.3656.1587.6543.1463.5390.6
Selected Courses
Windward / Leeward1638.01147.2907.3775.0706.0666.4641.5598.4569.7
All purpose1205.3867.2707.2622.2573.3540.0514.3472.3443.6
Single Number Scoring Options
CourseTime On
Distance
Time On
Time
Windward / Leeward742.20.8084
All purpose593.51.0109
 
Custom scoring options for Australia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low787.20.7622
Triple Number Coastal/Long Distance Medium592.41.0128
Triple Number Coastal/Long Distance High505.01.1882
Triple Number Windward/Leeward Low1027.20.5841
Triple Number Windward/Leeward Medium735.80.8154
Triple Number Windward/Leeward High631.60.9500
Custom scoring options for Austria
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance650.70.9220
Triple Number Coastal/Long Distance Low787.20.7622
Triple Number Coastal/Long Distance Medium592.41.0128
Triple Number Coastal/Long Distance High505.01.1882
Triple Number Windward/Leeward Low1027.20.5841
Triple Number Windward/Leeward Medium735.80.8154
Triple Number Windward/Leeward High631.60.9500
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1778.61156.4855.3700.7614.5563.1518.7436.8404.7
Custom scoring options for Brazil
Scoring OptionTime On
Time
Upwind "bolina"0.7394
Downwind "popa"0.8072
70% up, 30% down "Ilhabela"0.7585
30% up, 70% down "Ilhabela-inverso"0.7856
Custom scoring options for Bulgaria
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low787.20.7622
Triple Number Coastal/Long Distance Medium592.41.0128
Triple Number Coastal/Long Distance High505.01.1882
Triple Number Windward/Leeward Low1027.20.5841
Triple Number Windward/Leeward Medium735.80.8154
Triple Number Windward/Leeward High631.60.9500
Predominantly Upwind634.80.9452
Predominantly Downwind622.40.9640
Custom scoring options for Canada
Scoring OptionTODTOT
Triple Number AP Low787.20.7622
Triple Number AP Medium592.51.0127
Triple Number AP High505.01.1882
Triple Number Windward/Leeward Low1075.40.5579
Triple Number Windward/Leeward Medium735.80.8154
Triple Number Windward/Leeward High631.60.9500
Single Number Predominant Upwind657.30.9128
Single Number Predominant Reaching584.41.0266
Single Number Predominant Downwind650.80.9219
Predominant Upwind - Low910.90.6587
Predominant Upwind - Low/Med696.00.8620
Predominant Upwind - Medium613.20.9785
Predominant Upwind - Med/High567.01.0582
Predominant Upwind - High542.21.1067
Predominant Downwind Low1013.40.5921
Predominant Downwind Low/Med725.80.8267
Predominant Downwind Medium596.81.0054
Predominant Downwind Med/High508.11.1808
Predominant Downwind High446.81.3430
Predominant Reaching Low846.20.7090
Predominant Reaching Low/Med639.00.9390
Predominant Reaching Medium546.31.0983
Predominant Reaching Med/High478.61.2536
Predominant Reaching High434.21.3818
SA/DSPL Upwind38.26SA/DSPL Downwind38.26
Scoring OptionTODTOT
5-Band Windward/Leeward Low1210.60.4956
5-Band Windward/Leeward Low/Med866.30.6926
5-Band Windward/Leeward Medium722.20.8308
5-Band Windward/Leeward Med/High643.80.9320
5-Band Windward/Leeward High600.90.9986
Windward/Leeward 60-40 Low1190.20.5041
Windward/Leeward 60-40 Low/Med862.80.6954
Windward/Leeward 60-40 Medium731.00.8208
Windward/Leeward 60-40 Med/High663.20.9046
Windward/Leeward 60-40 High628.10.9553
5-Band AP Low882.90.6796
5-Band AP Low/Med681.00.8810
5-Band AP Medium582.11.0308
5-Band AP Med/High516.51.1617
5-Band AP High474.61.2643
5-Band SF Bay Tour - Low1029.80.5827
5-Band SF Bay Tour - Low/Med825.00.7273
5-Band SF Bay Tour - Medium697.80.8598
5-Band SF Bay Tour - Med/High627.10.9568
5-Band SF Bay Tour - High584.91.0258
Chicago-Mac Upwind0.8836
Chicago-Mac All Purpose0.8883
Chicago-Mac Downwind0.8798
Bayview-Mac Cove Island0.6314
Bayview-Mac Shore0.6397
Harvest Moon Regatta494.51.2133
Custom scoring options for Cyprus
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance650.70.9220
Triple Number Coastal/Long Distance Low787.20.7622
Triple Number Coastal/Long Distance Medium592.41.0128
Triple Number Coastal/Long Distance High505.01.1882
Triple Number Windward/Leeward Low1027.20.5841
Triple Number Windward/Leeward Medium735.80.8154
Triple Number Windward/Leeward High631.60.9500
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1778.61156.4855.3700.7614.5563.1518.7436.8404.7
Custom scoring options for Denmark
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance650.70.9220
Triple Number Coastal/Long Distance Low787.20.7622
Triple Number Coastal/Long Distance Medium592.41.0128
Triple Number Coastal/Long Distance High505.01.1882
Triple Number Windward/Leeward Low1027.20.5841
Triple Number Windward/Leeward Medium735.80.8154
Triple Number Windward/Leeward High631.60.9500
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1778.61156.4855.3700.7614.5563.1518.7436.8404.7
Custom scoring options for Spain
Scoring OptionTime On
Distance
Coastal/Long Distance650.7
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1778.61156.4855.3700.7614.5563.1518.7436.8404.7
Custom scoring options for Estonia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low787.20.7622
Triple Number Coastal/Long Distance Medium592.41.0128
Triple Number Coastal/Long Distance High505.01.1882
Triple Number Windward/Leeward Low1027.20.5841
Triple Number Windward/Leeward Medium735.80.8154
Triple Number Windward/Leeward High631.60.9500
Custom scoring options for Finland
Scoring OptionTime On
Distance
Time On
Time
FinRating650.70.9220
FinRating, kevyt tuuli1191.10.8396
FinRating, kova tuuli473.41.0563
Custom scoring options for France
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low787.20.7622
Triple Number Coastal/Long Distance Medium592.41.0128
Triple Number Coastal/Long Distance High505.01.1882
Triple Number Windward/Leeward Low1027.20.5841
Triple Number Windward/Leeward Medium735.80.8154
Triple Number Windward/Leeward High631.60.9500
Custom scoring options for Germany
Scoring OptionTime On
Time
Coastal/Long Distance0.9220
Triple Number Coastal/Long Distance Low0.7622
Triple Number Coastal/Long Distance Medium1.0128
Triple Number Coastal/Long Distance High1.1882
Triple Number Windward/Leeward Low0.5841
Triple Number Windward/Leeward Medium0.8154
Triple Number Windward/Leeward High0.9500
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1778.61156.4855.3700.7614.5563.1518.7436.8404.7
For information
General Purpose Handicap (GPH)671.4
Custom scoring options for Greece
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance650.70.9220
Triple Number Coastal/Long Distance Low787.20.7622
Triple Number Coastal/Long Distance Medium592.41.0128
Triple Number Coastal/Long Distance High505.01.1882
Triple Number Windward/Leeward Low1027.20.5841
Triple Number Windward/Leeward Medium735.80.8154
Triple Number Windward/Leeward High631.60.9500
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1778.61156.4855.3700.7614.5563.1518.7436.8404.7
Custom scoring options for Hungary
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low787.20.7622
Triple Number Coastal/Long Distance Medium592.41.0128
Triple Number Coastal/Long Distance High505.01.1882
Triple Number Windward/Leeward Low1027.20.5841
Triple Number Windward/Leeward Medium735.80.8154
Triple Number Windward/Leeward High631.60.9500
Custom scoring options for Israel
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance650.70.9220
Triple Number Coastal/Long Distance Low787.20.7622
Triple Number Coastal/Long Distance Medium592.41.0128
Triple Number Coastal/Long Distance High505.01.1882
Triple Number Windward/Leeward Low1027.20.5841
Triple Number Windward/Leeward Medium735.80.8154
Triple Number Windward/Leeward High631.60.9500
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1778.61156.4855.3700.7614.5563.1518.7436.8404.7
Custom scoring options for Japan
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance650.70.9220
Triple Number Coastal/Long Distance Low787.20.7622
Triple Number Coastal/Long Distance Medium592.41.0128
Triple Number Coastal/Long Distance High505.01.1882
Triple Number Windward/Leeward Low1027.20.5841
Triple Number Windward/Leeward Medium735.80.8154
Triple Number Windward/Leeward High631.60.9500
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1778.61156.4855.3700.7614.5563.1518.7436.8404.7
Custom scoring options for Korea
Scoring OptionTime On
Distance
Triple Number Coastal/Long Distance Low787.2
Triple Number Coastal/Long Distance Medium592.4
Triple Number Coastal/Long Distance High505.0
Triple Number Windward/Leeward Low1027.2
Triple Number Windward/Leeward Medium735.8
Triple Number Windward/Leeward High631.6
Predominantly Upwind634.8
Predominantly Downwind622.4
Predominantly Reaching581.3
Custom scoring options for Lithuania
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance650.70.9220
Triple Number Coastal/Long Distance Low787.20.7622
Triple Number Coastal/Long Distance Medium592.41.0128
Triple Number Coastal/Long Distance High505.01.1882
Triple Number Windward/Leeward Low1027.20.5841
Triple Number Windward/Leeward Medium735.80.8154
Triple Number Windward/Leeward High631.60.9500
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1778.61156.4855.3700.7614.5563.1518.7436.8404.7
Custom scoring options for Netherlands
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7622
Triple Number Coastal/Long Distance Medium1.0128
Triple Number Coastal/Long Distance High1.1882
Triple Number Windward/Leeward Low0.5841
Triple Number Windward/Leeward Medium0.8154
Triple Number Windward/Leeward High0.9500
Coastal/Long Distance0.9220
Predominantly Upwind0.9452
Predominantly Downwind0.9640
For information
General Purpose Handicap (GPH)671.4
Custom scoring options for Norway
Scoring OptionTime On
Time
Distanseseilas Singeltall  (APH)1.0109
Distanseseilas Trippeltall svak vind0.7622
Distanseseilas Trippeltall mellomvind1.0128
Distanseseilas Trippeltall sterk vind1.1882
Pølsebane Trippeltall svak vind0.5841
Pølsebane Trippeltall mellomvind0.8154
Pølsebane Trippeltall sterk vind0.9500
Motvind Singeltall0.9452
Medvind Singeltall0.9640
Custom scoring options for Portugal
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low787.20.7622
Triple Number Coastal/Long Distance Medium592.41.0128
Triple Number Coastal/Long Distance High505.01.1882
Triple Number Windward/Leeward Low1027.20.5841
Triple Number Windward/Leeward Medium735.80.8154
Triple Number Windward/Leeward High631.60.9500
Coastal/Long Distance650.70.9220
Custom scoring options for Russia
Scoring OptionTime On
Distance
Time On
Time
Predominantly Upwind634.80.9452
Predominantly Downwind622.40.9640
Custom scoring options for South Africa
Scoring OptionTime On
Distance
Time On
Time
Cape Doctor Inshore578.31.0375
Cape Doctor Coastal452.21.3268
Triple Number Coastal/Long Distance Low787.20.7622
Triple Number Coastal/Long Distance Medium592.41.0128
Triple Number Coastal/Long Distance High505.01.1882
Triple Number Windward/Leeward Low1027.20.5841
Triple Number Windward/Leeward Medium735.80.8154
Triple Number Windward/Leeward High631.60.9500
Custom scoring options for Slovenia
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7622
Triple Number Coastal/Long Distance Medium1.0128
Triple Number Coastal/Long Distance High1.1882
Triple Number Windward/Leeward Low0.5841
Triple Number Windward/Leeward Medium0.8154
Triple Number Windward/Leeward High0.9500
Custom scoring options for Switzerland
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7622
Triple Number Coastal/Long Distance Medium1.0128
Triple Number Coastal/Long Distance High1.1882
Triple Number Windward/Leeward Low0.5841
Triple Number Windward/Leeward Medium0.8154
Triple Number Windward/Leeward High0.9500
Custom scoring options for Sweden
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance650.70.9220
Triple Number Coastal/Long Distance Low787.20.7622
Triple Number Coastal/Long Distance Medium592.41.0128
Triple Number Coastal/Long Distance High505.01.1882
Triple Number Windward/Leeward Low1027.20.5841
Triple Number Windward/Leeward Medium735.80.8154
Triple Number Windward/Leeward High631.60.9500
Predominantly Upwind634.80.9452
Predominantly Downwind622.40.9640
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1778.61156.4855.3700.7614.5563.1518.7436.8404.7
Custom scoring options for Ukraine
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance650.70.9220
Triple Number Coastal/Long Distance Low787.20.7622
Triple Number Coastal/Long Distance Medium592.41.0128
Triple Number Coastal/Long Distance High505.01.1882
Triple Number Windward/Leeward Low1027.20.5841
Triple Number Windward/Leeward Medium735.80.8154
Triple Number Windward/Leeward High631.60.9500
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1778.61156.4855.3700.7614.5563.1518.7436.8404.7
Custom scoring options for United States of America
Scoring OptionTODTOT
Triple Number AP Low787.20.7622
Triple Number AP Medium592.51.0127
Triple Number AP High505.01.1882
Triple Number Windward/Leeward Low1075.40.5579
Triple Number Windward/Leeward Medium735.80.8154
Triple Number Windward/Leeward High631.60.9500
Single Number Predominant Upwind657.30.9128
Single Number Predominant Reaching584.41.0266
Single Number Predominant Downwind650.80.9219
Predominant Upwind - Low910.90.6587
Predominant Upwind - Low/Med696.00.8620
Predominant Upwind - Medium613.20.9785
Predominant Upwind - Med/High567.01.0582
Predominant Upwind - High542.21.1067
Predominant Downwind Low1013.40.5921
Predominant Downwind Low/Med725.80.8267
Predominant Downwind Medium596.81.0054
Predominant Downwind Med/High508.11.1808
Predominant Downwind High446.81.3430
Predominant Reaching Low846.20.7090
Predominant Reaching Low/Med639.00.9390
Predominant Reaching Medium546.31.0983
Predominant Reaching Med/High478.61.2536
Predominant Reaching High434.21.3818
SA/DSPL Upwind38.26SA/DSPL Downwind38.26
Scoring OptionTODTOT
5-Band Windward/Leeward Low1210.60.4956
5-Band Windward/Leeward Low/Med866.30.6926
5-Band Windward/Leeward Medium722.20.8308
5-Band Windward/Leeward Med/High643.80.9320
5-Band Windward/Leeward High600.90.9986
Windward/Leeward 60-40 Low1190.20.5041
Windward/Leeward 60-40 Low/Med862.80.6954
Windward/Leeward 60-40 Medium731.00.8208
Windward/Leeward 60-40 Med/High663.20.9046
Windward/Leeward 60-40 High628.10.9553
5-Band AP Low882.90.6796
5-Band AP Low/Med681.00.8810
5-Band AP Medium582.11.0308
5-Band AP Med/High516.51.1617
5-Band AP High474.61.2643
5-Band SF Bay Tour - Low1029.80.5827
5-Band SF Bay Tour - Low/Med825.00.7273
5-Band SF Bay Tour - Medium697.80.8598
5-Band SF Bay Tour - Med/High627.10.9568
5-Band SF Bay Tour - High584.91.0258
Chicago-Mac Upwind0.8836
Chicago-Mac All Purpose0.8883
Chicago-Mac Downwind0.8798
Bayview-Mac Cove Island0.6314
Bayview-Mac Shore0.6397
Harvest Moon Regatta494.51.2133
Non Spin/HSFClub Certificate2025
SUPERCIUKITA-561M24
FEDERAZIONE ITALIANA VELA
Distr.:UVAI  www.uvai.it
Tel. + 39068841273
E-mail  segreteria@uvai.it
Data in meters/kilograms (Metric)
HULL AND APPENDAGES (Lightship Trim)
ClassMelges 24Measurement19/03/1996HINPlan reviewHull constructionCoredCarbon rudderNoLight stanchionsNoTrim tabNo
LOA7.509Max. Beam2.490Draft1.525Displacement821Wetted area10.31IMS L7.250LSM06.692Acc. length7.509Sink (kg/mm) 8.78
VCGD0.040VCGM0.020RM Rated (kg·m) 25.1Limit of positive stability(°) N/AStability IndexN/ADefault crew weight388Declared crew weight375
PROPELLER
Propeller TypeNo Propeller
Hydro generatorNo
RIG
Forestay tensionAftInner stayNone FittedMast materialCarbonSingle headsail furlerNoMainsail furlerNoArticulated bowspritNoNon-circular riggingNoFiber riggingNoAdjustable mast footNoRunning backstays0Checkstays0Spreaders1Rotating mastNo
P8.818IG8.620ISPMDT10.076MDL10.120MDT20.062MDL20.075TL1.578MW0.114GO0.114
E3.800J2.506BAS1.000FSD0.000SFJ0.200SPLWPLTPSBD0.103MWTMCG
Flying Headsail Foretriangles IdISPTPS
FLOTATION AND STABILITY
Calculation methodPoles incliningFlotation Date16/03/2017
W118.5W218.5W318.5W418.5
PD1427.9PD2432.4PD3428.3PD4436.5
WD7.400PLM9000.00GSA1.0RSA1.0RM25.0
BALLAST
TANKS
INVENTORY
IdDescriptionWeight SailingLCGVCGGAIdDescriptionWeight SailingLCGVCGGA1MIN 12kg OUTBOARD   
INVENTORY
Fixed Ballast Total0
Total deductible
OTHER ITEMSIdKindDescriptionWeightLCGVCG1EngineMIN 12kg OUTBOARDTotal deductible
Non Spin/HSFClub Certificate2025
SUPERCIUKITA-561M24
FEDERAZIONE ITALIANA VELA
Distr.:UVAI  www.uvai.it
Tel. + 39068841273
E-mail  segreteria@uvai.it
MAINSAIL
IdMHBMUWMTWMHWMQWAreaMeas.DateCommentM0.180.931.682.703.3321.38CLASS RULES & MEAS
HEADSAIL
IdHHBHUWHTWHHWHQWHLPHLUBtnFlyingFTAreaMeas.DateCommentH0.050.400.761.422.092.788.56NoNo 12.13CLASS RULES