In an Urban Residential Low Density District UR-1, the following uses are permitted:
(a) One-family dwelling structures;
(b) Accessory structures and uses in association with permitted structures;
(c) Church or other place of worship provided it occupies a lot of not less than three acres;
(d) Public school offering general education courses and having no facilities on the lot regularly used for housing or sleeping of students, faculty or staff.