(a) The fact that a lien claimant is employed at different kinds of labor or at different rates of wages during the period of general employment is not considered an interruption of the continuity of employment.
(b) A temporary cessation of employment of the lien claimant under an understanding of resumption of employment within a reasonable time is not considered an interruption of the continuity of employment so as to cause the time to run within which the notice of the lien is required to be filed for record.