I remember the one time I was off for more than one day was during the time we had no vicar and my line manager was one of the youth team who works in management and he said I needed to fill in a form which “the church should have” but no-one at church knew what the sick leave policy was! I do know I only get a month at full pay if I’m off long term sick as that’s in my contract but it’s another one of these areas where churches don’t always know what they’re doing as they don’t employ many people so these thigns don’t always come up.