Until a historic preservation ordinance is adopted, structures fifty years or older proposed for modification or removal shall be evaluated for eligibility for the National Register of Historic Places (NRHP) or the Washington State Heritage Register (WSHR). Modifications to structures determined eligible for the NRHP or WSHR shall be subject to SMC 14.225.080 and SMC 14.225.030(A)(1). Removal of structures determined eligible for the NRHP or WSHR shall be subject to SMC 14.225.080.