The DUP has sought legal advice on a council plan to place Irish-language signs on a North Belfast street.
Councillors last month voted to use discretionary powers to push through proposals to erect four Irish signs at Clifton Street despite local responses not meeting the council's policy criteria.
The application for Irish signs received 64.3% in favour, just below the 66.6% figure required under Belfast City Council's current policy.
Nine occupiers (64.3%) were in favour, two (14.3%) against, one (7.1%) had no preference, and two (14.3%) did not respond to the survey.
Councillors had received legal advice that such "marginal" figures meant they could have "discretion" to go ahead and approve all four Irish street signs on Clifton Street.
All except four DUP members approved pressing ahead with the plan at a committee meeting last month.
The DUP had proposed at a previous committee placing Irish signs on three out of four locations along the street, but not at Carlisle Circus near the unionist lower Shankill area.
The committee decision to erect the signs was due to be ratified at February's full council meeting, but the DUP has "called in" the plan.
The procedure can be requested if 15 per cent of councillors believe a decision was not properly reached or would adversely affect a section of the community.
A lawyer is then asked to examine the decision to help determine whether it should be reconsidered.
The Clifton Street plans came into the spotlight last year following speculation on whether an Irish street sign would be placed on the local Orange hall, where signs are often located. The council confirmed no signs would be placed on the hall.
DUP councillor Brian Kingston, the party's group leader, said the council plan "did not respect the wishes of the Orange Hall and unionist community".
He said: "Whilst the bottom end of Clifton Street is beside a majority nationalist area at Carrick Hill, the top end of Clifton Street is beside a majority unionist area at Lower Shankill.
"We asked therefore that no Irish street sign be erected at the top end of the street, beside the Orange Hall.
"We stand by the position that the committee should have considered the street in two sections and should have respected the wishes of the Orange Hall and of the local community in Lower Shankill at the top end of Clifton Street."
He added: "We have called-in the decision to approve dual-language street signs for Clifton Street on grounds of being procedurally incorrect, in that it did not meet the threshold in the policy, and on grounds of adverse community impact, in that it did not respect the wishes of the Orange Hall and unionist community at the top of the street."
A new policy for dual language signs was ratified in January last year, and is expected to replace the current policy soon.
It will mean a resident of any Belfast street, or a councillor, can trigger a consultation on a second nameplate, with 15% in favour being sufficient to erect the sign.
