Answer:
Cooperative house rules
Step-by-step explanation:
A cooperative house rules can be defined as the set of rules and regulations that are set by mortgage companies to regulate the activities and actions of the house owners.
In this scenario, Andrew owns a cooperative apartment and would like to verify if he is allowed to install a washer/dryer in his unit. Therefore, Andrew should look at the cooperative house rules to find the information pertaining to whether or not, he's permitted (allowed) to install a washer or dryer in his unit.