b'Section 16 of the 2004 Act provides as follows: 16Arrangements for discharge of functions by others (1)A fire and rescue authority (the first authority) may enter into arrangements with (a)another fire and rescue authority, or (b)any other person, for the discharge to any extent by that other authority or person of a function conferred on the first authority under any of sections 6 to 9 and 11. (2)But a fire and rescue authority may enter into arrangements with a person under subsection (1) in relation to its function of extinguishing fires only if the person employs fire-fighters. (3)Arrangements under this section may include provision as to the terms on which any function is to be discharged (including provision as to payment). Sections 6 to 9 and 11 of the 2004 Act set out various functions. The functions of a fire and rescue authority are found in Part 2 of the 2004 Act. These include core functions as follows: promoting fire safety within its area; making provision for the purpose of fighting fires in its area; making provision for the purpose of rescuing people in the event of road traffic accidents in its area; and responding to other incidents of emergency both inside and outside of its area. Fire and rescue authorities also have a duty to provide other functions such as responding to other eventualities. Section 15 of the 2004 Act makes provision for arrangements with employers of firefighters and the power to charge. Section 29 deals with powers to charge for equipment. Water supply is dealt with in Part 5, sections 38 to 43. Sections 5A to 5L of the 2004 Act include provisions similar, but not identical, to those set out in sections 1 to 4 of the 2011 Act. The new section 5A of the 2004 Act provides that a relevant fire and rescue authority may do anything it considers: appropriate for the purposes of the carrying-out of any of its functions (its functional purposes); appropriate for purposes incidental to its functional purposes; appropriate for purposes indirectly incidental to its functional purposes through any number of removes; to be connected with any of its functions, or anything it may do under any of the above. 117'