What are the provisional, national and international classification levels?

Paralympics Australia's classification FAQs describe three levels:

• Provisional: for beginners or local competition.
• National: required for national events.
• International: required for world championships and the Paralympics.

Higher-level outcomes override lower ones. International classification is similar to national classification, but each federation sets its own minimum age, location and timing, and places are limited and may be prioritised.

Source: https://www.paralympic.org.au/classification/classification-faqs/