It was 100 hrs in the preceding 12 months for many years at many big regionals, but I believe times have changed. I have heard stories of failures for folks who show up woefully rusty, so it might be worth getting some time to take the rust off. Would you rather put your family in a plane with a pilot who hadn’t flown in 5 years, or one who has been logging 60-70 + hrs a month for the last 5 years?