In a C-1 zone the following uses and their accessory uses are permitted after review by the planning commission pursuant to the mini-hearing process listed in Chapter 18.100 PRMC and PRMC § 18.110.020:
(a)
Residential use as an accessory use to an established use allowed in the C-1 zone.
(b)
Expansion of a use allowed prior to the adoption of the ordinance codified in this title.