The rules of the house are rules of conduct developed by a cooperative to ensure a harmonious cooperative life. The rules of procedure usually cover topics such as noise level, parking spaces, pets and waste disposal. RCM stands for Registered Cooperative Manager. This is a professional designation for cooperative site managers who have successfully completed NAHC`s registered Cooperative Manager Program. Income limits are found in many types of affordable housing. The cooperative or developer sets certain conditions for admission or renewal in residential areas for people with low incomes. Some housing co-operatives, including those developed by state assistance programs to create affordable housing, have income limits for incoming members.