Contract of consulting services

Answer:
By “facilitation body” I believe you mean “consulting company”.

I can suggest including:
What is the purpose of the project – Implementation of an EMS according to ISO 14001:2015
What are the deliverables – The success criteria will be getting the ISO 14001:2015 certification by an accredited certification body
What is the timeline agreed – When will the project start, when will the project finish, what kind of work rhythm will be followed
Who will work with us – Be careful to ensure that you will have someone with experience working with you. Sometimes, consulting companies start the negotiations with an experienced consultant and then, when the work starts they put an inexperienced junior working with you
How will the project be controlled – What kind of information they will issue, with what frequency, abo ut the project monitoring and control. And monitoring and control meeting frequency
Ownership and accountability – Who will be responsible for handling problems and complaints
Payment conditions – You can consider link partial payments to meeting and approval of project milestones
Cancellation terms and notice required
Confidentiality - Details the terms of confidentiality the consultant must uphold.
Date of contract

The following material will provide you with information about implementing ISO 14001:
- List of ISO 14001 implementation steps - https://advisera.com/14001academy/blog/2019/08/27/key-iso-14001-benefits-to-customers/nowledgebase/list-of-iso-14001-implementation-steps/
- Free online training ISO 14001:2015 Foundations Course - https://advisera.com/training/iso-14001-internal-auditor-course/
- ISO 14001:2015 Documentation Toolkit - https://advisera.com/14001academy/iso-14001-documentation-toolkit/
- Book - The ISO 14001:2015 Companion – A Straightforward Guide to Implementing an EMS in a Small Business - https://advisera.com/books/the-iso-14001-2015-companion/