yes for mandatory carb heat systems for Canadian home builts,
so I put 600 hours on a Rans 912uls and twice the engine stumbled, the only explanation being carb ice must have been starting, they're cheap compared to being scared or damaging your plane. you/ll feel wonderful about that $ still in your bank account as the engine struggles to breath .... both times the rough running was almost hard to detect (like could have been missed by a passenger not tuned in to mechanics) and short lived, but what would it have been without the hot water jackets?
and this reminds me, there is a new system with electric heat, improved from the earlier failure version that used a probe, and they are only 40 miles away, so I'll update when I confirm there service record - good timing for my K3 912ul rebuild project