; (II) safety requirements; or (III) aesthetic or concealment requirements (unless such requirements prohibit or have the effect of prohibiting the installation or modification of such facilities or structures). (iii) Timeframes (I) In general Except in the case of an eligible facilities request to which section 6409(a) of the Middle Class Tax Relief and Job Creation Act of 2012 ( 47 U.S.C. 1455(a) ) applies, a State or local government or instrumentality thereof shall grant or deny a complete request for authorization to place, construct, or modify a personal wireless service facility not later than— (aa) in the case of a request for authorization to place, construct, or modify a personal wireless service facility that is not a small personal wireless service facility— (AA) if the request is for authorization to place, construct, or modify such facility using an existing structure, including with respect to an area that has not previously been zoned for personal wireless service facilities (other than small personal wireless service facilities), 90 days after the date on which the complete request is received by the government or instrumentality; or (BB) if the request is for any other action relating to such facility, 150 days after the date on which the complete request is received by the government or instrumentality; and (bb) in the case of a request for authorization to place, construct, or modify a small personal wireless service facility— (AA) if the request is for authorization to place, construct, or modify such facility using an existing structure, 60 days after the date on which the complete request is received by the government or instrumentality