(1) The provisions of this Chapter shall not operate to the prejudice of any rights to which a worker may be entitled under any other law or under the terms of any award, agreement, or contract of service:
     Provided that where such award, agreement or contract of service provides for a longer leave with wages than provided in this Chapter the worker shall be entitled only to such longer leave.
     Explanation.--For the purpose of this Chapter leave shall not, except as provided in section 30, include weekly holidays or holidays for festivals or other similar occasions.