of the basic step comes from the number of separate actions. With the 6-basic one counts (1)step (2)step (3)kick (4)settle (5)kick (6)settle or (1)kick (2)settle (3)kick (4)settle (5)kick (6)settle, with the 9-basic it is (1)kick (2)ball (3)change (4)kick (5)settle (6)settle (7)kick (8)settle (9)settle. This means that a correct rock and roll kick will have the supporting foot settling on the floor a tiny moment before the kicking foot settles. Dance categories The World Rock'N'Roll Confederation (WRRC) recognizes the following dance categories for international competitions: Youth: No acrobatics allowed. Couples are 14 years old or younger. Juniors: A maximum of four acrobatic moves are allowed under the category's safety regulations. Couples are between 12 and 17 years of age. Main Class Contact Style: Two dances per couple and round. One is a dance program with no acrobatics allowed (footwork, or foot technique), the other an acrobatic program (acrobatic) requiring six acrobatic moves. The male may throw the female into the air, but no flips are allowed. Minimum age is 14 years. Main Class Free Style: Two dances, as in B-Class. Only difference to B-Class is that almost all acrobatics (e.g. lifts, jumps, throws and flips) are allowed. Minimum age is 15 years. National associations usually have additional classes (e.g., a C class for beginning competitive dancers). However, all have the four classes listed above (though some rules may differ). Rhythm and music Rock and roll dance works on the 4/4 measure, one basic step comprising six beats and therefore one and a half measures. Unlike much rock 'n' roll music, the dance puts stress on the first and third beats of each measure. Because of its non-off beat stressing and speed, the dance has now replaced traditional rock 'n' roll music with modern disco and pop music, played very fast, between 176 and 208 bpm. Clothes Current advanced tournament rock and roll dancers wear neither petticoats nor jeans, as the dancers originally did, but rather multicoloured costumes made of elastic artificial fibre, made individually by special tailors. One reason is that their acrobatic maneuvers have grown more and more dangerous, requiring rugged apparel that still provides freedom of movement. The shoes they wear are especially important, as their soles must both grip and slip properly. The most common footwear is light jazz shoes for the dance programs and, especially for women, usually aerobics sneakers for the acrobatic programs. Organization The WRRC