Gas companies are apparently supposed to check gas lines in homes here every few months. Nevermind I just got the first check the entire time I have lived in this apartment. I would have expected the gas heater to be checked as well, but the only thing that got checked was the gas line leading up to the stove.
Then again, the gas heater is outside the apartment, so any leaks there are not going to be as serious as a leak from within. The smoke leaking from other apartments into mine seems to be a far greater threat. At least it reduces the oxygen available to any potential fire starting in this flat.