Tell me about Section 216 regarding harbouring an offender who has escaped from custody or whose apprehension has been ordered.
Section 216 deals with harbouring an offender who has escaped from custody or whose apprehension has been ordered. Whenever any person convicted of or charged with an offence, being in lawful custody for that offence, escapes from such custody, or whenever a public servant, in the exercise of the lawful powers of such public servant, orders a certain person to be apprehended for an offence, whoever, knowing of such escape or order for apprehension, harbours or conceals that person with the intention of preventing him from being apprehended, shall be punished based on the nature of the offence. If the offence for which the person was in custody or is ordered to be apprehended is punishable with death, the punishment may extend to seven years of imprisonment and a fine. If punishable with imprisonment for life or imprisonment, the term may extend to three years of imprisonment, with or without fine. If the offence is punishable with imprisonment which may extend to one year and not to ten years, the punishment is based on the description provided for the offence, up to one-fourth part of the longest term of imprisonment provided for such offence, or with fine, or with both. The section includes explanations and exceptions, stating that the term 'offence' in this section includes any act or omission of which a person is alleged to have been guilty out of India. The exceptions mention that the provision does not extend to the case in which the harbour or concealment is by the husband or wife of the person to be apprehended. [Chapter 11, Section 216]