There are underground rules that people, both legit and criminal live by. (please see black boards). It is unlawful for anyone to sell a child. The sale of any unauthorized person is automatic termination. Often times, some colony areas have an old law. Mothers are the only ones who can have their child desexed. Fathers are the only ones who can sell their sons to complexes, illegally. Colony is unable to enforce a proper law against this for the sole reason that the System is not designed to recognize any sort of abuse. If the System falls, colony's defenses are down, so local people usually overthrow Complexes. Complexes are usually kept in imp territory, for safety purposes and for protect against colony officials and E's (E's cannot remain around imps for long generally). Another reasons Complexes slip through the cracks, those who can usually afford it, are those that are usually in power. Complexes were totally destroyed once imps allied with colony and colony was able to surf imp wastelands. But even illegally if a child was to be sold, it would be the father to do it.