Incomplete question. However, I inferred you are referring to the prescriptive Period for violation of special laws as enshrined under Act. No. 3326 guiding the Philippines.
Step-by-step explanation:
Note that the prescriptive period refers to a legal terminology that simply refers to the maximum period (time) after an event before legal proceedings may be initiated.
Here's a summary of the act;
Section 1. Violation of special laws should be:
"(a) after a year for offenses punished only by a fine or by imprisonment for not more than one month, or both;
(b) after four years for those punished by imprisonment for more than one month, but less than two years;
(c) after eight years for those punished by imprisonment for two years or more, but less than six years; and
(d) after twelve years for any other offense punished by imprisonment for six years or more, except the crime of treason, which shall prescribe after twenty years. Violations penalized by municipal ordinances shall prescribe after two months. .."
Section. 3 defines special laws as acts defining and penalizing violations of the law not included in the Penal Code.