4. Any person engaged in any employment under the Government or in any employment or class of employment to which this Ordinance applies who,-(a) disobeys any lawful order given in course of such employment, or attempts to persuade any person to disobey any such order, or(b) without reasonable excuse abandons such employment or absents himself from work,shall be guilty of an offence under this Ordinance. ¹[Explanation 1].- A person abandons his employment within the meaning of this section who, notwithstanding that it is an express or implied term of his contract of employment that he may terminate his employment on giving notice to his employer of his intention to do so, so terminates his employment without the previous consent of his employer. ²[Explanation 2.- Absence from work in pursuance of any notice of strike given or purported to be given under any law shall not be deemed to be a reasonable excuse within the meaning of this section.]