2. The grand-father, grand-mother, father, mother, offspring, grandchild, sibling, wife or husband of an offender, who fails to denounce the latter•s crime, shall bear penal liability only in cases of failing to denounce crimes against national security or particularly serious crimes prescribed in Article 313 of this Code. Chapter IV STATUTE OF LIMITATION FOR PENAL LIABILITY EXAMINATION, PENAL LIABILITY EXEMPTION Article 23.- Statute of limitation for penal liability examination 1. The statute of limitation for penal liability examination is the time limit prescribed by this Code upon the expiry of which the offender shall not be examined for penal liability. 2. The statute of limitation for penal liability examination is stipulated as follows: a) Five years for less serious crimes; b) Ten years for serious crimes; c) Fifteen years for very serious crimes; d) Twenty years for particularly serious crimes. 3. The statute of limitation shall begin from the date a crime is committed. If within the time limit prescribed in Clause 2 of this Article, the offender commits a new crime for which this Code stipulates a maximum penalty of over one year, the time already past must not be counted and the statute of limitation for the previous crime shall be re-calculated from the date the new crime is committed. If within the above-said time limit, the offender deliberately flees and is being hunted for by warrant, the time of fleeing away must not be counted and the statute of limitation shall be re-calculated from such time the person gives him/herself up or is arrested. Article 24.- Non-application of statute of limitation for penal liability examination The statute of limitation for penal liability examination prescribed in Article 23 of this Code shall not apply to crimes provided for in Chapter XI and Chapter XXIV of this Code Article 25.- Penal liability exemption 1. An offender shall be exempt from penal liability if during the investigation,