In the absence of central or state laws requiring cleaning of pet excreta by pet owners, you cannot impose any rule, regulation or bye-law, with respect to mandatory cleaning of the same, or impose special charges or fines on pet owners. You can, of course, request them to do so.
2) You can also experiment with the creation of various pet defecation areas within community premises. These can be imaginatively spaced out within the precincts, and you can request pet owners to train their pets into using the same. You cannot however impose fines and special charges of any kind on pet owners, because there is no mandate in law for the same.