Different rules for different groups
A policy is a bundle of rules — allowance, accrual, approval chain, the lot — assigned to a group of people. Most companies need at least two: full-time and part-time. Some want six: contractors, interns, founders, sales-on-commission, the leadership team, the rest. Build as many as you need, edit any of them in one place, and changes ripple through to everyone on that policy from the same minute.