Okla. Stat. tit. 63, § 63-142.11: Exemptions

Notwithstanding anything which may be contained in this act to

the contrary, public agencies and their contractors engaged in work

within the public right-of-way which work is a preengineered

project, certified project or routine maintenance shall be exempt

from the provisions of this act. Provided, a public agency

contractor, prior to engaging in routine maintenance, shall take

reasonable steps to determine the location of underground facilities

in or near the proposed area of work. Reasonable steps may include

utilization of the statewide one-call notification center procedures

as provided for in Section 142.6 of this title.