there is not any here, but some cities require them. but, as stated, they are meaningless ways to collect money rather than ensure any quality. there is a push though, in our area to get a required certification. there is one already offered, but until they are required it is meaningless. it is a very rigorous field test and written test that truely measures your competence in design and repair. i am sure most would fail that work around here.
all is fair in love and grass!
Man, it smells like sheet, do you smell that!!