Arlene Foster is to be grilled in the Assembly about her party's links to the preferred Giant's Causeway visitors' centre developer.
The Environment Committee is inviting her to appear before it next week after she said she was minded to grant planning permission to fellow DUP member Seymour Sweeney's Seaport Ltd company.
Ms Foster has denied party considerations influenced her decision and pointed to the split with grassroots DUP members in North Antrim who want the facility in public hands.
She also faces questions over Planning Policy Statement 14, which restricted rural development but was overturned after a recent judicial review.
DUP committee member Peter Weir said: "If we can get the minister that would be very helpful in the light of the issues. There is a sense of urgency on these issues."
Mr Sweeney has admitted ties with north Antrim DUP figures. Ian Paisley Jnr bought a house from him at the market rate many years ago. The businessman also signed nomination papers for DUP Moyle councillor David McAllister, whose local authority includes the Causeway.
On Monday, just after her announcement, the Department of Enterprise decided to scrap plans for a publicly financed project, which DUP minister Nigel Dodds said would save the taxpayer #21m but which the SDLP has likened to selling a pot of gold.
Earlier this week, in the Assembly, Sinn Fein's Daithi McKay said the DUP ministers may have faced a conflict of interest with the developer, whose portfolio includes a bar and the Giant's Causeway and Bushmills Railway.
Mr Sweeney has said he engages with all local parties.
The SDLP's Declan O'Loan has submitted a Freedom of Information Act request for details of Ms Foster's consideration of the matter. Future plans have been uncertain since 2002 after the original visitors' centre burned down.
The Giant's Causeway attracts thousands of visitors every year and is a UNESCO World Heritage site.
Neighbouring Coleraine Borough Council wants the facility to be publicly-built.