What is the source for Idi Amin's long self-appointed title?

"His Excellency, President for Life, Field Marshal Al Hadji Doctor Idi Amin Dada, VC, DSO, MC, CBE, Lord of All the Beasts of the Earth and Fishes of the Seas and Conqueror of the British Empire in Africa in General and Uganda in Particular" and "the Last King of Scotland."

What is the original source of this? Are there Ugandan documents or press releases that use these titles?