1. That the offender has been legally married.
2. That the marriage has not been legally dissolved or, in case his or her spouse is absent, the absent spouse could not yet be presumed dead according to the Civil Code.
3. That he contracts a second or subsequent marriage.
4. That the second or subsequent marriage has all the essential requisites for validity (Atilano O. Nollora, Jr. Vs. People of the Philippines, G.R. No. 191425. September 7, 2011).