The method-of-loci is good for memorizing lists. I would rewrite each line in very simple English and then extract the smallest number of keywords from each line as possible.
1. Simplify the language
Line 1: natural justice is essential; imported from US into the constitution
Line 2: does the procedure have requirements, not unfair [I don’t know the context of this line]
2. Extract keywords
Line 1: justice, US
Line 2: procedure, requirements, fairness
3. Create mnemonic images
4. Place images in memory journey
5. Review the journey and material, and revise the images if necessary
Edit: I’m assuming that you are just memorizing the ideas and not verbatim text. If you are trying to memorize it word-for-word, please see How Do I Memorize a Book? and verbatim-text.