ICMS Convention No. 51/18, published on July 5th, amended ICMS Convention No. 190/17, which governs, under the terms authorized in Complementary Law No. 160/2017, the remittance of tax credits arising from exemptions, incentives, and tax or financial-tax benefits established in disagreement with the provisions of letter "g" of item XII of paragraph 2 of article 155 of the Federal Constitution, as well as the corresponding restitutions.

Considering the changes made, ICMS Convention No. 190/17 will become effective with the following deadlines to be observed by the states and ICMS taxpayers:

December 28th, 2018 - for publication of normative acts not in force on August 8th, 2017.

July 31st, 2019 - for Confaz to be able to postpone, in specific cases and subject to the quorum of a simple majority, the compliance with the requirement of publication of the previous normative acts. The request by the applicant state must be accompanied by an identification of the normative acts covered by the application, as indicated in the model contained in the Sole Annex to ICMS Convention No. 190/17.

August 31st, 2018 - for registration and deposit in Confaz of the acts in force on the date of registration and deposit.

July 31st, 2019 - for registration and deposit in Confaz of acts not in force on August 8th, 2017.

December 27th, 2019 - for Confaz to be able to postpone, in specific cases and subject to the quorum of a simple majority, the compliance with the registration and deposit of the previous acts. The request by the applicant state must be accompanied by supporting documentation that is related to the acts granting the tax benefits.

ICMS Convention No. 51/18 also validates acts of registration and deposit made in the period from June 30th, 2018 until the date of its entry into force.

The seventh section of ICMS Convention No. 190/17 was also amended to exclude the obligation of states to provide information and documents related to operations and installments provided by tax benefits, as well as the economic segment, activity, merchandise or service whose tax benefit was provided (respectively, items XII and XIII of the original version of the ICMS Convention No. 190/17).