These writ petitions arise out of a common order passed by the Labour Court, Madurai, in certain interlocutory applications filed by the petitioners herein in claim petitions preferred by the first respondent in W.P. No. 1736 of 1969 and the second respondent in each of the remaining writ petitions. All the petitioners are owners of motor transport undertakings coming within the scope of the Motor Transport Workers Act, 1961 (Central Act XXVII of 1961) hereinafter referred to as “the Act.” The first respondent in W.P. No. 1736 of 1969 has filed C.P. No. 287 of 1967 under section 33 (C) (2) of the Industrial Disputes Act, 1947, claiming overtime wages. The second respondent in W.P. No. 1829 of 1969 has filed C.P. No. 399 of 1966 claiming difference in wages between the minimum wages payable to him and the wages actually paid to him. The second respondent in W.P. No. 1895 of 1969 has filed C.P. No. 240 of 1967 claiming washing allowance provided for under section 10 (2) of the Act. The second respondent in W.P. No. 1896 of 1969 has filed C.P. No. 301 of 1966 claiming overtime wages and bonus. The second respondent in W.P. No. 1897 of 1969 has filed C.P. No. 266 of 1967 claimi