Yes. Section 70a.7 was redesignated and revised as part of Part 71.7, as noted in the Federal Register entry [63 FR 56744, October 22, 1998]; see Part 70 listings for the original Part 70 context.
The original title was “Request for Correction or Amendment to a Record.” This heading appears in the Part 70a metadata; see the Part 70 listings at https://www.osha.gov/laws-regs/regulations/standardnumber/70.
The Government Publishing Office (GPO) source for the provision is the e-CFR entry linked in the Part 70a metadata; the Part 70 summary is available at https://www.osha.gov/laws-regs/regulations/standardnumber/70.
The Federal Register notice is [63 FR 56744, October 22, 1998], which documents the redesignation and revision of 70a.7 as part of Part 71.7; you can confirm the original Part 70 listing at https://www.osha.gov/laws-regs/regulations/standardnumber/70.
No — you should rely on the current rule where 70a.7 was moved and revised (Part 71.7) rather than the old Part 70a text. The Part 70 listing notes the redesignation; see https://www.osha.gov/laws-regs/regulations/standardnumber/70 for the original entry and follow the redesignation to the current part.
No. The document explicitly states that no related interpretation letters were found for this batch. For the Part 70 listing and its administrative note, see https://www.osha.gov/laws-regs/regulations/standardnumber/70.
Part 70a covered the protection of individual privacy in records. This subject heading is shown in the Part 70a metadata; see the Part 70 listing at https://www.osha.gov/laws-regs/regulations/standardnumber/70.
Cite the Federal Register action that redesignated and revised 70a.7: [63 FR 56744, October 22, 1998], and refer readers to the current regulatory location (Part 71.7). You can also reference the original Part 70 listing at https://www.osha.gov/laws-regs/regulations/standardnumber/70 for historical context.
The section was part of Part 70a, which dealt with protection of individual privacy in records; responsibility for administering the regulation lies with OSHA as part of its record-keeping and privacy regulatory framework. The Part 70 listing is available at https://www.osha.gov/laws-regs/regulations/standardnumber/70.
Look in the current regulatory location that replaced 70a.7 (Part 71.7) for the up-to-date procedures; the Part 70 listing documents that 70a.7 was redesignated, see https://www.osha.gov/laws-regs/regulations/standardnumber/70 and then consult the current Part 71 provisions for the active requirements and procedures.