Adoption laws vary from state to state and by agency. Such laws and policies govern the entire process and also determine who is eligible to adopt. Included in this determination are several general requirements that most agencies will review when concluding if an individual or couple is right for adoption. Prospective parents should be aware that state and county procedural and legal factors are generally unalterable. Adoption agencies will also have additional restrictions for adoptive parents as well. Some of the criteria may be established by the objectives of the agency, and the types of adoptions the agency offers.