"The voting on the Constitution should be strictly linked to the simultaneous adoption of the amendments to Articles 1 and 10 of the law on the special status to make it permanent according to the 'Steinmeier's formula'," Gryzlov said.
"Revision of the amendments to the law on the special status must be agreed upon by the Contact Group," he added.
At the same time, according to Gryzlov, it is necessary to enshrine in the Constitution that "the powers of individuals elected in the Donbas under the separate law will not be terminated in 2017, as the constitutional reform envisages for the entire Ukraine."
He also noted the need to find a legal way to ensure that the transitional provisions of the Ukrainian Constitution would "make reference to the current version of the Articles 2-9 of the law on the special status and Articles 1 and 10 renegotiated by the Contact Group."
"This formula should be captured in the Constitution of Ukraine," Gryzlov concluded.