Notwithstanding the date the pipeline was installed or any earlier deadlines for compliance, each pipeline, which qualifies for use under this Part in accordance with section 255.14 of this Part, must meet the corrosion control requirements specifically applicable to pipelines installed before August 1, 1971, and all other applicable requirements within 1 year after the pipeline is readied for service. However, the corrosion control requirements specifically applicable to pipelines installed after July 31, 1971, apply if the pipeline substantially meets those requirements before it is readied for service or it is a segment which is replaced, relocated, or substantially altered.