In Pennsylvania, the sale or rental of dwellings in a particular housing development or building can be restricted to tenants with no children only if this restriction is part of a plan for a retirement or senior citizens' establishment in which 80% of the units have at least one resident who is AT LEAST

The age of 45 does not meet the legal requirement for establishing a senior citizens' housing community under federal guidelines. The law specifies that at least 80% of the units must have residents who are 55 years of age or older, thus rendering 45 years too young to qualify for this restriction.

While 60 years old might seem reasonable for senior housing, it exceeds the minimum age requirement set by the Fair Housing Act. Thus, although some senior developments may target older residents, implementing a restriction based on this age alone would not comply with federal housing regulations.

The age of 62 is often associated with other senior benefits, such as Social Security, but it is not the minimum age required for age-restricted housing under the Fair Housing Act. Like the previous options, this age exceeds the necessary threshold, making it an incorrect choice for establishing the legal basis for tenant restrictions.