The order was issued after the court dismissed a petition by ex-Democrat MP Banjob Roongroj, seeking revocation of bail for the pair. He was acting on behalf of Sathit Pitutacha, a Democrat Party executive board member.
The judge rejected the request for bail cancellation, saying the petitioner was not a litigant or a stakeholder in the cases of Mr Jatuporn and Mr Nattawut and was not entitled to file the petition.
However, since the petitioner provided information accusing the red-shirt leaders of breaching bail conditions, the judge decided that a hearing should be held to verify whether the alleged violation had been committed.
According to the complaint, Mr Jatuporn and Mr Nattawut violated their bail conditions by provoking United Front for Democracy against Dictatorship (UDD) members from across the country to prepare weapons and manpower for counter protests against the People's Democratic Reform Committee.
The alleged provocation took place at a "UDD war drum" meeting held on Feb 23 in Nakhon Ratchasima province.
The complaint said the pair also publicised false or misleading facts and information while delivering speeches at the event.
The judge asked the UDD front men, Mr Banjob and Mr Sathit to testify in court on April 28 at 9.30am.
Mr Jatuporn and Mr Nattawut are among 24 UDD leaders charged with terrorism for their role in the red-shirt protests between March and May 2010.