1. That there be a bill, resolution, or ordinance enacted or approved or pending
    approval by Congress or any provincial board or municipal council;
2. That the offender (any person) alters the same;
3. That he has no proper authority therefor; and
4. That the alteration has changed the meaning of the document.

Accused must not be a public official entrusted with the custody or possession of
such document, otherwise Art. 171 applies.

There can be no falsification through reckless imprudence as that will be
inconsistent with the element of intent to cause damage in said crime.