Any sexually oriented businesses operating on (effective date of this Ordinance) that is in violation of § 25-41.11e shall be deemed a nonconforming use. A nonconforming use will be permitted to continue for a two-year period with possible extensions for extenuating circumstances to be granted by the City Council only upon a convincing showing of extreme financial hardship. Such extensions shall not exceed a total of three years in addition to the initial amortization period. Any such nonconforming business loses its right to operate as a nonconforming use, if, for any reason, it voluntarily discontinues its business operation for a period of 30 days or more or if its license to operate is revoked, and such revocation is not overturned by a court of competent jurisdiction. Such nonconforming uses, while nonconforming, shall not be increased, enlarged, extended or altered except that the use may be changed to a conforming use.