Which act prohibits willfully allowing an inmate to escape?

The act that specifically addresses the willful allowance of an inmate's escape is Section 147. This provision within the legal framework is designed to maintain the integrity of the correctional system by criminalizing the actions of individuals who may purposely assist or enable an inmate to escape from lawful custody. It underscores the seriousness with which the justice system treats escapes, emphasizing accountability for those who are in positions of authority or responsibility over inmates.

Other options listed, such as the Criminal Code and the Control Drug Substance Act, cover a broad range of offenses but do not specifically focus on the facilitation of inmate escapes. The CCRA/CCRR pertains to the Canadian federal correctional system, but it does not center on the direct prohibition of actions related to the willful escape of inmates as Section 147 does. Therefore, the specificity and legal ramifications outlined in Section 147 make it the correct answer regarding this scenario.