Which value for “parking_space” tag in case of a place reserved to funeral vehicles ?

Hello,

I want to add a parking space reserved to funeral vehicles (hearses). This parking space is located next to a church.

The problem is that I can't find a parking_space value that fits my case in the wiki or taginfo.

Is there a value for this case ? Should I use a more general value ? Can I create and/or sumbit a new value if it doesn't exist ?

Thanks for your help ! :)