Do the installation instructions need to follow the exact wording used in paragraphs 9(a) and 9(b) of the regulations?

No. Paragraphs 9(a) and 9(b) suggest wording to the effect of or wording that achieves the same meaning as the statements in these paragraphs.

The exact words in paragraphs 9(a) and 9(b) do not need to be used in the installation instructions that you supply with your blinds and curtains. But it is mandatory that your installation instructions capture the concept that those words stand for.