On-premises sign for a school, camp, church,
health-care facility, health-care service, private club or other institution
of a similar nature, displaying the name of the institution and its
activities or services, provided that the sign area shall not exceed
24 square feet, and provided that not more than one such sign shall
be erected on any street frontage of any property in single and separate
ownership. Said sign shall be set back at least 1/3 the distance of
any required yard.