The public utilities companies shall place their utility lines and related facilities underground whenever the following streets are improved pursuant to Articles 2 through 7 of this chapter: King Street, Beretania Street, Kapiolani Boulevard, Kalakaua Avenue, Ward Avenue, and Keeaumoku Street.
(Sec. 20-6.1, R.O. 1978 (1983 Ed.)) (1990 Code, Ch. 14, Art. 22, § 14-22.1)