Cllr. Theobald quit his leadership role on West Lindsey District Council last week after allegations were made against him and the authority.
The Lincolnshire Echo investigation highlighted that a planning application submitted by Cllr. Theobald to build a country house on land he part-owned was under investigation. His own deputy Cllr. Adam Duguid, Conservative (Market Rasen), then called for him to resign on Wednesday last week. Cllr. Theobald has been suspended from the Gainsborough Constituency Conservative Association.
The independent Audit Commission is expected to publish a report on governance issues at the council by Friday while its planning department is also under investigation.
As leader, Cllr Theobald was responsible for representing the authority on the East Midlands Regional Assembly, Lincolnshire Assembly, Local Government Association General Assembly plus the Local Government East Midlands General Meeting.
The Lincolnshire Echo report that Cllr. Theobald is required to vacate these roles along with positions held on the West Lindsey Local Strategic Partnership and the West Lindsey Local Strategic Partnership Strategic Housing Board.
A spokesman for West Lindsey District Council said:
"The seat on these organisations belongs to whoever is leader of West Lindsey District Council."Cllr. Theobald's chairmanship of another group - the Central Lincolnshire Joint Strategic Planning Committee - will be discussed at its next meeting in the new year.
The paper report that Cllr. Theobald declined to comment. Cllr. Theobald has blamed the Lincolnshire Echo investigation as the reason for his resignation. It is understood he is seeking legal recourse.