All rights or remedies of the City are expressly saved as to any and all violations of previous zoning regulations or amendments thereof of said City that have accrued at the time of the effective date of this Ordinance; and to such accrued violations, the City and the courts shall have all the powers that existed prior to the effective date of this Ordinance; and that all existing violations of previous zoning regulations which would otherwise become nonconforming uses under this Ordinance shall not become legal nonconforming uses under this Ordinance, but shall be violations of prior zoning regulations.