The term FDIS stands for “final draft international standard”. Therefore FDIS version is final draft of ISO 45001 standard i.e. occupational health and safety management system.
It was issued for voting on 11th November 2017 and the voting continues till 25th January 2018. After the agreement on FDIS version, ISO finally publishes the standard in March 2018.
See the list of mandatory documents to be maintained by ISO 45001:2018 compliant organization.
It is said that the FDIS version contains almost the same content as in the published version of ISO 45001:2018. Therefore some people find an easy way by getting a free copy of FDIS ISO 45001:2017 online and use it in place of the standard. However in law abiding organizations this practice is not recommended.
Note: People search for the free copy of FDIS, but it should be noted that the copies of FDIS circulated on different websites violate the copyrights of ISO and the member bodies who own the standard. One can now purchase a published version of the standard ISO 45001 from the ISO store or any other store of ISO national member organization.