This week, an update (PDF) to Metrolinx's offences and fines comes into effect under the Provincial Offences Act. The offences are not particularly surprising - they mainly concern parking on Metrolinx property.

But this isn't the only update that UP Express, GO train or bus users should be aware of. At the beginning of November, a more comprehensive update (PDF) was released where much of the focus was on rules of conduct for passengers.

Besides the common sense safety regulations, like not hanging on to the outside of a GO train, and basic rules of hygiene, like wearing shoes on trains, there are a few, more unusual things you can't do on a Metrolinx vehicle.

Here's a round-up of some of the more surprising things you can't do on a UP Express train, GO train, bus or any other Metrolinx property.

1. Expectorating (coughing or spitting up phlegm) on company property is not permitted. This carries a fine of $100 and according to Metrolinx spokesperson Mark Ostler, the offence falls under the etiquette section of Metrolinx by-laws. The purpose is to keep company property clean, a reasonable request, though also a highly visual one.

2. Operating a music device "at [a] volume that disturbs other passengers" can cost you $100. This is where over-the-ear headphones could save you from a decent fine.

3. You can't in-line skate or skateboard on Metronlinx property, and don't try to work around these regulations by roller-skating - all three are offences that could lead to an $85 fine.

4. Putting something on a nearby seat, like your feet or anything else that could damage the seat, may mean a fine of $75, as does lying down on company property, which has a heftier fine of $100.

5. Placing material on Metrolinx property can result in a $100 fine, but what exactly does material mean? Ostler clarifies that the offence refers to distributing flyers and other printed material without company permission.

As to be expected, most of these offences are in place to ensure travellers have a pleasant experience and don't injure themselves or others. While the regulations and their corresponding fines may seem harsh, Ostler says that transit safety officers have some discretion in "deciding whether not not to issue a notice of violation."

Just don't spit on your seat mate.

Are you surprised by any of these rules? Let us know in the comments.

Photo by MrDanMofo in the blogTO Flickr pool.