This standard is the main management systems specification document in the ISO 14000 series.
It contains the required elements that must be satisfied by an organization seeking registration or certification for its Environmental Management Systems to the standard.
COMPLYING WITH ISO 14001
This is the only standard intended for registration by a third party (along the lines of ISO 9001 or QS 9000). All the others are for guidance.
Fortunately, there are resources available to help achieve this. The one recommended by this portal is The ISO 14000 Toolkit. This includes a number of components: an ISO 14001 policy manual, a set of procedures, a comprehensive ISO 14000 training presentation, an audit checklist, a significant number of data collection forms, etc
It is documented on its own website: The ISO 14000 Toolkit