Please, could you clarify for me is it necessary to put an article (whether indefinite or definite) before a title of someone's position, job title, etc?
For example in context of official documents or articles:
(The/a) CIO needs to sign for implement a procedure.
The service check is performed by (the/a) Head of Security on a monthly basis.
The central hospital examination needs to be initiated by (the/a) Minister of Healthcare.
All articles I've found regarding this question are very ambiguous. So I just wonder is there any rule for such case.