1.   For the purposes of this Regulation, in relation to domestic payment transactions that are not distinguishable as debit or credit card transactions by the payment card scheme, the provisions on debit cards or debit card transactions are applied.

2.   By derogation from paragraph 1, until 9 December 2016, Member States may define a share of no more than 30 % of the domestic payment transactions referred to in paragraph 1 of this Article that are considered to be equivalent to credit card transactions to which the interchange fee cap set in Article 4 shall apply.