The following uses shall be permitted in the PO zone:
(A) Professional, medical, financial, administrative, public service, general business offices and similar office uses;
(B) Laboratories and pharmacies in conjunction with, and accessory to, medical and dental offices;
(C) One single-family dwelling unit in conjunction with, and accessory to, a permitted office use.
(D) Educational institutions and professional, technical and vocational schools if included on a site with a minimum size of 30 acres.
('86 Code, § 23.24.020) (Ord. 4110, passed - - ; Am. Ord. 4162, passed - - ) Penalty, see § 1.12.010