Is assiging Multiple legal entity to single project possible ?

Summary:

Hello,
We are trying to identify how to handle projects which span different entities within a country.

• Do we get project accounting team to set up one project for each legal entity impacted and insist that the supplier splits the invoice into different legal entities
• Do we get the project accounting team to set up one project for each legal entity, have the supplier invoice the main legal entity and then recharge the costs through ICO (not sure how we would then get the costs between different legal entities on project module)
• Do we use header and sub projects (google suggests that this is possible across different legal entities but don't know if we are set up for this)