The title of Part 70a is "Protection of Individual Privacy in Records," which identifies the part as covering privacy protections for individual records. See 70a (Part 70) for the part designation and title.
The section 70a.1 (Purpose and Scope) was redesignated and revised as Part 71.1, meaning the material was moved and updated under the new part number. This change is recorded in the Federal Register (63 FR 56741, October 22, 1998) and is noted in the OSHA listing for the part at 70a (Part 70).
The redesignation and revision of 70a.1 to Part 71.1 was published on October 22, 1998 (see 63 FR 56741). The OSHA part listing reflects that change—see 70a (Part 70) for the official record.
No — 70a.1 indicates the provision was redesignated and revised as Part 71.1, so the current substantive privacy requirements are located in the redesignated part rather than in the old 70a.1 text. OSHA’s part listing confirms the redesignation at 70a (Part 70).
You should cite the redesigned provision under Part 71.1 (the redesignation of 70a.1 into Part 71.1). The redesignation is documented in the Federal Register (63 FR 56741, October 22, 1998) and is noted on OSHA’s part page—see 70a (Part 70) for the official reference to the change.
The GPO (electronic Code of Federal Regulations) source is listed for the section as the e-CFR; the redesignation is recorded in the Federal Register (63 FR 56741, October 22, 1998). OSHA’s part listing shows the part information—see 70a (Part 70) for the OSHA reference and consult the e-CFR for the official codified text.
No, there are no related Letter(s) of Interpretation available for this section in the provided batch; the record for 70a.1 only shows the redesignation and revision note. OSHA’s part page confirms the part information—see 70a (Part 70).
The practical next step is to consult the redesignated and revised provisions under Part 71.1, since 70a.1 was moved there; do not rely on the old 70a.1 entry for current regulatory language. You can start from OSHA’s part listing at 70a (Part 70) and then locate the current Part 71.1 text in the e-CFR or OSHA’s updated regulations.