Michael Grant:
It's the last line in the file in the [Service] section. A little research shows that this line seems to belong in the [Unit] section.The people that you should talk to are Lennart Poettering who wrote that, and Zbigniew Jędrzejewski-Szmek who reviewed it.
* https://github.com/systemd/systemd/commit/7ddcdb6072745fe96dee4df08f5f874c057069e4
* https://github.com/systemd/systemd/pull/8335