(b)[ "agreement" means a combination of all of the following agreements, namely: - [Substituted by Finance Act, 2018 (Act No. 13 of 2018), dated 29.3.2018.](i)an agreement entered into under sub-section (1) of section 90 or sub-section (1) of section 90A; and(ii)an agreement for exchange of the report referred to in sub-section (2) and notified by the Central Government;]