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Decree Law No. 87/2011

Publication: Republic Diary No. 136/2011, Series I of 2011-07-18
  • Issuer: Ministry of Economy, Innovation and Development
  • Diploma Type: Decree Law
  • Number: 87/2011
  • Pages: 4026 - 4027

Summary in plain english

What is it?

This decree-law defines the rules for calculating and for selling tariff adjustments in the natural gas sector.

The price that companies can charge for natural gas is decided by the Energy Services Regulatory Authority (ERSE). Every year, ERSE defines that price based on estimates. When these estimates are wrong, the consumer might be charged less than the actual cost of the natural gas. The tariff adjustments are price adjustments made the following year to compensate the companies for that difference.

What will change?
Calculating the tariff adjustments

The value of the tariff adjustments are defined by ERSE during the process of calculating prices. The adjustments must be calculated separately for each company in the sector.

Companies may trade the tariff adjustments to which they are entitled

Companies may sell to third parties the right to receive the adjustments.

The interested parties pay the costs associated with the sale of those rights. The prices charged to the consumer must not be affected by these deals.

Companies have the right to receive the tariff adjustments even if they stop providing the service or go bankrupt.

What are its benefits?

This decree-law is intended to:

  • make prices more stable
  • make the rules of gas and electricity sectors more similar.
When does it come into effect?

This decree-law comes into effect the day after being published. However, it also applies to tariff adjustments calculated before that date.

Original Version


  • Legal translator is the translation of texts within the field of law


Legislative consolidation integrates the various amendments and rectifications made into an original legal diploma in order to make its consultation more accessible to the citizen.