It is very easy: this is a vote whether the text of OOXML is mature enough to get published as an ISO standard.
National standards bodies are mostly not part of the government, however in many nations government interventions can overrule the standard body process. ISO is no international organization but an NGO. Like FIFA for soccer ISO is your org for standards. Politics and soccer are of course interlinked, so is politics and standards.
The game works like this:
- ISO stamp for standards
- government agencies feel/are obliged to implement/use ISO standards.
Governments still have the choice. The best approach to be cloned is currently taken by the Dutch government.