Can someone analyze and formulate a case digest on whether an administrative agency can decide matters that involve pure questions of law: Phelix Mining Corporation G.R. No. L-29669, February 29, 1972? with three parts the facts with a brief background on the case (not more than three paragraphs), the issue, and the ruling.

https://lawphil.net/judjuris/juri1972/feb1972/gr_l_29669_1972.html