Directors of the Australian Christian Lobby have registered the organisation's Canberra office premises as a separate not-for-profit entity.
Eternity House, the Deakin headquarters of both the ACL and the ACT branch of school chaplaincy provider Scripture Union, was quietly announced as one of two additions to the Australian Charities and Not-for-profits Commission register in Canberra during February.
The registration of the new not-for-profit came amidst an Australian Sex Party push for a review into the qualifications necessary for religious organisations to gain charity status.
Described in its constitution as existing "solely for the purpose of the advancement of the Christian religion", Eternity House's goal is to make "property and facilities available to charitable organisations with similar purposes".
The ABN was registered on December 4, with its charity status recognised in February.
ACL managing director Lyle Shelton confirmed the new organisation was "a not-for-profit entity which owns property".
"ACL is a tenant of an office complex owned by Eternity House."
The ACL's chairman, Jim Wallace and director David Burr are listed as responsible persons on the Eternity House charity register profile.
ACL, one of the most prominent organisations expected to push the 'no' campaign on the proposed same-sex marriage plebiscite, has also made headlines recently for its opposition to the Safe Schools Program.
The Australian Sex Party has called for the ACL to be stripped of its charity status, claiming the reasons for religious charity registration needed to be tightened beyond the current qualification of "advancing the cause of religion".
The party's campaign is focused primarily on Victoria, the only state or territory in which it has a sitting member of parliament.
Victorian upper house MP Fiona Patten said the lobby's political campaigns went beyond its charitable brief.
"Many people I speak to are absolutely appalled when they learn that the likes of the Australian Christian Lobby are basically subsidised by the Australian taxpayer," she said.
"How are these activities in any way said to be advancing the cause of religion, especially when marriage equality is a major election issue?"
However, an ACL spokesman said any plan to change the law would be met with "considerable pushback" and could lead to severe burdens for smaller religious congregations which performed social good.
According to the government's Australian Business Register, the ACL has been eligible for access GST concessions, income tax exemptions, and fringe benefits tax rebates since 2005.
Eternity House is only eligible to access income tax exemptions according to the same register.