The subtype code describes in more detail the type of device. Refer to the device type and subtype tables. For information about altering the type of a previously examined gravimetric device, consult bulletin M-08.

Note 1:  A vehicle scale is considered unattended if it is:

• designed and intended to be used without the presence of a full-time operator; or
• used by a trained operator during the day, but not during the night.

Note 2:  If a previously certified vehicle scale is modified to allow for unattended operation, it must be recertified (see bulletin M-08). Contact your Measurement Canada regional gravimetric specialist if you have any questions on whether or not an examination is required or what limits of error are applicable.