Under article 104, section 6 (course and suspension of limitations on criminal prosecution), of the Criminal Code, absolute limitations on criminal prosecution become effective after expiry of twice the time period required by law for limitation of criminal prosecution.
根据《刑法》第104条第6款(过程和暂停限制刑事起诉)，在两倍于法律规定的限制刑事起诉时间期满后，绝对限制刑事起诉生效。