Mobility between railway transport companies or between establishments employing locomotive engineers may be limited due to seniority provisions of collectiveagreements.
由于集体协议的资历规定，雇佣机车工程师的铁路运输公司之间或部门之间，用人的流动性可能会受到限制。
2
National laws or regulations or collectiveagreements may provide for the exemption from the provisions of this Convention of vessels of less than 200 gross register tons.
国家法律或条例或集体协议可以规定小于200总登记吨的船舶免受本公约各条款的约束。
3
Effect shall be given to this Convention by national laws or regulations, collectiveagreements, works rules, arbitration awards or court decisions or other means appropriate to national conditions.