Where can I find the description of note 7 of HSxxx code 5911: "Textile products and articles, for technical uses, specified in Note 7 to this Chapter" ?

The same with HSxxxx code 870821: "Safety seat belts of the motor vehicles of 87.01-87.05". Where do I find the explanation of 87.01-87.05?

Who can help?

The information you request is available from World Customs Organization. It may or may not be availble freely. You would need to check their website or contact them.

http://www.wcoomd.org/ie/en/en.html

I found the information I was looking for. Thank you very much!