come operative only to the extent that Subdivision 9. is deemed constitutional upon the reversal of the trial court decision in the case of World Wide Rush, LLC v. City of Los Angeles , United States District Court Case No. CV 07-238 ABC. In addition, notwithstanding the provisions of Sec. 13B.10.1. (General Provisions) of Chapter 1A of this Code, this prohibition shall not apply to any building permit issued prior to the effective date of this ordinance if the Department of Building and Safety determines that both substantial liabilities have been incurred, and substantial work has been performed on site, in accordance with the terms of that permit pursuant to Section 91.106.4.3.1 of Chapter 9 of this Code. 10. (Deleted by Ord. No. 182,706, Eff. 10/12/13.) 11. Are off-site signs, including off-site digital displays. This prohibition shall also apply to alterations, enlargements or conversions to digital displays of legally existing off-site signs with regard to the following exceptions: (Amended by Ord. No. 187,145, Eff. 9/30/21.) EXCEPTIONS: This prohibition shall not apply to: (a) alterations that conform to the provisions of Section 91.6216 and all other requirements of this Code; or (b) off-site signs specifically permitted pursuant to a relocation agreement entered into pursuant to California Business and Professions Code Section 5412; or (c) off-site signs, including off-site digital displays, that are specifically permitted pursuant to a legally adopted specific plan, supplemental use district or an approved development agreement; or (d) non-digital off-site signs that are authorized by a valid building permit for a temporary sign on temporary construction walls or on fences of solid wood or similar material surrounding vacant lots pursuant to Section 14.4.17. 12. Are inflatable devices, except when inflatable devices are specifically permitted pursuant to a legally adopted specific plan, supplemental use district or an approved development agreement. C. Prohibited Locations. 1. No sign or sign support structure shall project into any public alley, except that a sign or sign support structure above a height of 14 feet may project no more than six inches into a public alley. 2.