When a new structure is constructed or an existing structure is enlarged, or when the use of an existing structure is changed, off-street parking and loading spaces shall be provided according to the standards set forth in Chapter 10.34, Table 34-1. If a structure, existing on the effective date of this chapter, is enlarged so as to require additional parking spaces to conform to requirements of this chapter, such additional parking spaces shall be provided; however, the number of such additional spaces shall be computed with regard only to the extent of the enlargement, regardless of whether or not the number of previously existing spaces satisfies the requirements of this chapter. (Ord. 1634, § 128, 2004.)