What is Perjury, PC 118? Punishment? Defenses?

Perjury is lying, but as the reader may suspect, there is certainly more to the definition than just a one word synonym. Must the lying be under oath? Must it be intentional? Can it be in writing or is it only spoken? What are the defenses and what is the punishment? Is it a felony? To read more about this crime, please click on the following link – https://www.greghillassociates.com/what-is-perjury-pc-118-punishment-defenses.html