you would have to ask the field rules of where ever you plan to use them. some fields do,some fields dont.
the field I work not only allows use of smoke grenades that have a pull ring (no fuse or lighter required smoke grenades are a no no) but our pro shop sells them..
the only time the field I work at does not allow use of any smoke grenades is dureing extreamly dry conditions when burn bans are in effect for the area (being in the poconos near lots of state game lands)
__________________ I shot the Sheriff,The Deputy And the Ref.. But we all knew the Ref had it coming.
Ive seen some pretty odd smoke grenades. I bought a few also in pennsylvania at a fireworks store for like 50 cents each and smell really bad. I recommend the ones that are in a cylinder and you light. The are more expensive but they work really well