The IN District is an overlay zoning district to the existing underlying zoning districts, as shown on the Zoning Map. The provisions of the underlying zoning district shall remain in full force, except that the IN District provides alternative regulations that an applicant may choose to develop within. An applicant may choose to comply with all of the permitted uses and regulations of this IN District or all of the permitted uses and regulations of the underlying zoning district. If an applicant chooses to develop under the IN District regulations, such action shall not affect the need to comply with all other regulations of this chapter other than the underlying regulations.