To compensate for an initial lack of experience at the beginning of their careers, Conditionals are entitled to a weight allowance when riding against full professional Jockeys.  The ‘claim’ will depend on how many winners the Conditional has ridden (Rule (F)141):

7lb until they have won 20 races

5lb until they have won 40 races

3lb until they have won 75 races

A Conditional can claim an additional 3lb when riding for their employing Trainer in certain races, if they have ridden less than 5 winners.