Applicability of the rules on evidence

Under the Rules of Court, the rules of evidence are specifically applicable only to judicial proceedings. [Sec. 1, Rule 128]

In quasi-judicial proceedings, the same apply by analogy or suppletorily AND whenever practicable and convenient [Sec. 4, Rule 1], except in cases where the governing law or rules specify otherwise, e.g., the Rules on Electronic Evidence covers quasi-judicial and administrative bodies [Sec. 2, Rule 1, Rules on Electronic Evidence]; special rules are laid down in EO 292, series of 1987 [Revised Administrative Code], etc. Administrative investigations shall be conducted without necessarily adhering strictly to the technical rules of procedure and evidence applicable to judicial proceedings. (Dela Cruz v. Malunao. AM No P-11-3019)