CCC is the local planning authority, so it is the outside body with the most direct relevance to the draft Neighbourhood Plan. CCC will organise later stages of consultation on the Plan, an independent 'Examination' and the final referendum. If the Plan is agreed or 'made', it becomes part of CCC's suite of planning documents.
As the planning authority, it is responsible for producing and maintaining the Local Plan. Neigbourhood plans have to be in general conformity with the relevant local plan, so neighbourhood plans cannot contradict the key strategic policies of the local plan. Chelmsford Local Plan was adopted in May 2020. A Review process has started and is expected to complete in 2025.
Planning applications are determined by CCC. It also has responsibility for housing and many other functions.