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International Seed Testing Association
International Seed Testing Association
Richtiarkade 18
8304 Wallisellen, CH
+41 44 838 60 00
International Seed Testing Association

How to use the ISTA Rules


Please download the PDF files and open them using Adobe Acrobat or Acrobat Reader.
Acrobat Reader can be accessed free of charge here:

Viewing and Features

How to read the PDF file (1)

When opened, the PDF file should look like this.


  • Rules changes are highlighted in yellow
  • Summaries of the rules changes next to highlighted text
  • Links from contents list to chapters and sections
  • Searchable: shift-control-F to open the advanced search


How to read the PDF file (2)


  1. Click to show and hide panel
  2. Click to show and hide languages and highlighted rules changes

Text available in: 

  • English - French
  • English - German
  • English - Spanish

Rules changes


Note: Changes from the previous year’s Rules are highlighted in yellow for all languages but the details of the changes only correspond to the English version.

  1. Click to show or hide comment panel with rules change summaries
  2. Click on any summary to jump to its location (precise position in English only)
  3. Filter comments: click here to show or hide comment icons in rules
  4. Comment icon: when comment panel hidden, click on icon to view summary
  5. Click to show or hide highlighting. For printing purposes, it is recommended to hide the highlighting
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