An offence may not be prosecuted upon the expiration of the following periods from the time of its perpetration
1. 30 years-if the act is a felony of homicide
2. 20 years - if the act is another felony
2a. 15 years - if the act is an offense amenable to a penalty of imprisonment exceeding 5 years
3. 10 years- if the act is an offense amenable to a penalty of imprisonment exceeding 3 years
4. 5 years- in case of other offense