For those that are actually interested in why government bodies choose gender neutral language in official documents
The issue isn't gender neutrality in writing, it's poor English. Changing from singular to plural in the same sentence is a dodgy way of dealing with the issue.
Consider this excerpt from an actual accident report:
"The pilot's balls were itchy, and when they reached down to scratch them, they inadvertently knocked the fuel selector to the 'off' position, causing an immediate and total engine power loss due to fuel starvation."
See - terrible! It should have read 'The pilot's balls were itchy, and when he or she reached down to scratch them, he or she inadvertently knocked the fuel selector to the 'off' position.' That's much better.