Article 11 4.

By way of derogation from paragraph 2, if a Member State does not reach the objective referred to in paragraph 2, point (c), despite having implemented all energy efficiency measures and all measures to enhance the production of renewable energy, in particular those identified in the energy audits referred to in paragraph 1, Member States may exceptionally allow the purchase of energy from non-fossil fuel sources. Those purchases shall be limited to a maximum of 5 percentage points of the objective referred to in paragraph 2, point (c). That derogation shall be granted only to Member States that can demonstrate by 31 December 2040 that 35 % of external non-fossil fuel energy as referred to in paragraph 3 will need to be purchased to reach the objective referred to in paragraph 2, point (d), taking into account all energy efficiency measures and all measures necessary to enhance the production of renewable energy, in particular those identified in the energy audits referred to in paragraph 1.