Stand out in 2011 changes in the regulation associated with international interconnection facilities promoted by MME Ordinances No. 210 and 211, the Order of ANEEL General Director No. 1871 and by ANEEL Normative Resolution No.420. Such regulations equated, technically and commercially, transmission utilities and the facilities of Garabi 1 and 2 Transmission System, required for international exchanges of electricity. Also changed the rules of contracting services and use of transmission and introduced the additional tariffs for the use of international interconnection facilities for export and import of electricity - ADTUE, aiming at low tariffs for users of the transmission system.

Also in 2011, continuity was given to the operationalization of ANEEL Normative Resolution No. 399/2010, which improved the regulation of contracting transmission use, stating that the Contracts for Use of Transmission System - CUST of all generating plants would be suited until April 30th 2011, which was completed in the regulatory deadline for all 127 contracts.

In April and May 2011, was allowed the adequacy of Contracts for the Use of Transmission System - CUST of distribution utilities and permit holders and of the consumer units connected to the basic grid due to the publication of ANEEL Normative Resolution No. 429/2011, which modified ANEEL Normative Resolution No. 399/2010, creating a transition period for the application of tariffs for the use of the transmission system during off-peak periods.

With respect to conclusion of contracts, 18 new contracts were signed for the Provision of Transmission Services - CPST, 57 new Contracts for Use of Transmission Systems - CUST, 95 new Connection Contracts for Transmission Systems - CCT and Facilities Sharing Contracts - CCI in addition to five new contracts and two additive terms to the Contracts for Provision of Ancillary Services - CPSA.