the rules posted sound normal, but the foreign made ammo issue can be argued. S&B (Czech company) has been making ammo for well over a 100 years and are well respected through out the world. Rarely do you get bad ammo from them. I agree that most other "foreign" made ammo has poor QC and the brass is horrid.
Also the no military ammo issue is due to the reloadability factor and also the possibility of getting some steel cored stuff that would go right through their bask stops and out the building
Roger hit it on the head about the ventilation issue. Make sure that they have a nice system or you will be hurting (health wise) in a short time. Sometimes just having a door open at each end of the building is enough to get a breeze going and remove the lead in the air.