Contracting general practitioners are entitled to bonus payments for each calendar year where they achieve a 95% uptake in respect of the cohort of children on their panel who reach their second birthday during that year. This percentage uptake for bonus payments purposes is adjusted to reflect cases where parents have refused immunisation, where families have moved, or where immunisation is contraindicated. Bonus payments in respect of panels where GPs reached the appropriate threshold in 1999 are due by the end of March 2002. GPs enter into a contract with their health boards, and if payment has not been made to them they should, in the first instance, raise the issue of outstanding payment with the appropriate health board.