The binding legal principles established are: (1) A response by SARS to a notice under section 96(1) of the Customs and Excise Act is not administrative action within the meaning of PAJA and is therefore not reviewable. The section 96 notice is a mandatory first step before instituting legal proceedings and falls outside the internal administrative appeal process under Chapter XA of the Act. (2) On a proper interpretation of section 64F(1)(b) of the Customs and Excise Act, a licensed distributor of fuel (LDF) must obtain fuel directly from the stocks of a licensee of a customs and excise manufacturing warehouse to qualify for a refund of excise duty and fuel levy under section 75(1)(d). The word 'stocks' means the inventory of goods kept at the warehouse premises of the licensee. (3) Fuel purchased from an intermediary, even if that intermediary obtained the fuel from a licensed warehouse, does not satisfy the requirement that fuel be 'obtained from stocks of a licensee of a customs and excise manufacturing warehouse'. The plain language of the statute, read with the relevant rules and Schedule 6, requires direct acquisition from the licensed warehouse. (4) This interpretation is consistent with the purposes of the Customs and Excise Act, which include controlling the importation, export, storage, and removal of excisable goods, and enabling SARS to exercise supervision over licensed warehouses. Allowing fuel to be obtained through intermediaries would undermine these control mechanisms. (5) A refund or rebate of excise duty is a privilege, and strict compliance with the statutory conditions may be exacted from a claimant. The doctrine of estoppel cannot be applied against SARS to confer a power it does not have or to give validity to an ultra vires act.