xmlns:atom="http://www.w3.org/2005/Atom"
22In this Part—
“non-transitional charging year” means a charging year which is not a transitional charging year;
“notification date”, in relation to a charging year, means the latest date by which a notification under section 83 relating to that charging year is required to be given (see section 83(5));
“relevant Part 4B service” means—
a regulated user-to-user service described in paragraph 15(a), or
a pre-existing Part 4B service included in a regulated user-to-user service described in paragraph 15(b).