G.R. No. L-42204 - Farolan vs. Court of Tax Appeals

Petitioner Civil Aviation Authority of the Philippines Employees’ Union (CAAP-EU), formerly Air Transportation Employees’ Union (ATEU), filed an amended petition for prohibition with prayer for TRO and writ of preliminary injunction against CAAP and multiple executive-branch respondents.
Petitioner sought nullification of Authority Orders Nos. 77-08, 118-08, 139-08, 163-08, 172-08, 173-08, 181-08, 81-09, 82-09, 83-09, as well as the IRR of R.A. No. 9497, the Organizational Structure and Staffing Pattern (OSSP), and Qualification Standards (QS), alleging grave abuse of discretion and violation of security of tenure.

From 1931 to 1987, various legislative acts and executive orders (Act Nos. 3909, 3996, 4033; Commonwealth Act No. 168; R.A. Nos. 224, 776; EO Nos. 94, 209, 546, 125, 125-A) created and reorganized the Philippine civil aviation body, culminating in the Air Transportation Office (ATO) under DOTC.
In January 2008, the USA’s FAA downgraded the Philippines to Category 2. To address aviation safety deficiencies, Congress enacted R.A. No. 9497 on March 4, 2008, creating the CAAP (Sections 4, 85) and abolishing the ATO, with transitional personnel rules in Section 86.

Acting Director General Ciron issued orders and memoranda and, with a Board-approved IRR (published October 2008), OSSP and QS (DBM-approved July 20, 2009), implemented a hold-over regime for incumbent ATO personnel pending staffing pattern approval.
Petitioner challenged these measures as conflicting with R.A. No. 9497, infringing employees’ security of tenure, exceeding jurisdiction, expanding hold-over beyond Section 86’s scope, and ignoring agreed qualification standards and legislative intent.

Whether the ATO was validly abolished under R.A. No. 9497.
Whether the incumbent ATO employees’ constitutional right to security of tenure was impaired by the abolition.
Whether the hold-over provision in Section 60 of the IRR constituted grave abuse of discretion, given its absence in R.A. No. 9497.