Subject to the provisions of this section, signs for a legal nonconforming use as defined in the Planning and Development Code of the city are allowed. Signs for a legal nonconforming use shall be deemed to comply with the provisions of this chapter if they comply with the sign regulations for the most restrictive zoning district which permits the nonconforming use as an allowed use. Such signs shall be allowed only so long as the nonconforming use is allowed. Any such sign legally existing on April 4, 1970, but which does not comply with the regulations of this chapter shall be deemed to be a nonconforming sign under the provisions of this chapter and shall be subject to alteration or removal in accordance with the provisions of Section 15.148.790 of this chapter. Notwithstanding any provision to the contrary herein, no new or additional detached sign after April 4, 1970, for a nonconforming use shall be allowed. The owner of the property on which the sign is located shall have the primary responsibility for removing the signs required to be removed or altered under this article. (Ord. 2016-0010 § 33; Ord. 2013-0021 § 68; prior code § 3.10.180)