Change the award rules for one worker, without changing the policy. Send the whole set: every leave type in the worker's active policy must be listed in its group, even the ones you aren't changing. The values you send are what the worker should have at their current tenure tier.

A limit is required when the policy uses it and rejected when it doesn't, and a value can't be lower than the amount the policy adds for the worker's tenure. Anything wrong returns 422 and nothing is changed. Start from Get a worker's leave award rules. See the Guide to the Leave Accrual API.