Whether there were any requests for deviations from the mandatory cost containment measures announced by the National Treasury (a) in the 2016-17 financial year and (b) since 1 April 2017; if not, what is the National Treasury’s policy position with regard to requests for deviations in the specified financial year and period; if so, (i) what is the name of the department, constitutional entity and/or public entity that made a request for a deviation, (ii) when was each deviation (aa) requested and (bb) approved and/or denied, (iii) what was the nature of each specified deviation requested, (iv) what was the motivation for requesting each deviation and (v) why was the specified deviation request approved and/or denied in each case?