If a deed plan is submitted with an application, and that deed plan is marked on the plan as "draft", or "provisional", this is not grounds on its own for rejection of the application.
Although not common practice, occasionally draft plans are submitted with an application for a plans report, and then a finalised version is prepared and annexed to the deed that is submitted for registration (or simply included in the application if the application is a Voluntary Registration (VR)). However, if the applicant is satisfied that the draft plan is correct and accurately reflects the subjects to be registered, they may chose to save the expense of preparing a further version. Provided the plan is correctly annexed to the deed and correctly referred to in the text of the deed (or correctly referred to in the VR application form), it is not for the keeper to reject an application because the word "draft" has been left on a plan.
As with all other deed plans, a plan labelled "draft" must meet the keeper's requirements with regards to deed plans - see Further Guidance page Deed Plan Must Be Acceptable for full details. If the plan does not meet these criteria and the keeper cannot accurately plot the subjects onto the cadastral map, the application will be rejected on those grounds.