Latvian license plate: Moped (documented since 2010)

Format, years and the law

Format: L-999, for example B-897 (L is any letter, 9 any digit)
The format above follows the issuing rules: a registration that fits it is one this series could have issued.
Years issued: Documented since 2010; the format is likely older than the first year documented. Still issued.
Vehicle class: Moped: insurance/registration plates for mopeds (NL/DE small plates). Issued for moped.
Colours: Characters #000000 Background #FFFFFF
Size: 133 × 165 mm · every country's size

Moped 520×110 mm

moped · 520 × 110 mm
About this plate: THE MOPED MARK. Shares the trailer's one-letter shape but caps the digits at three rather than four, and shares its letters-for-digits substitution. The G blank is 133 x 165 mm, TALLER THAN IT IS WIDE, one of only two such plates in the file (the other is the off-road H type, identical in size).
Separators: hyphen on the A type; the G type (133 x 165 mm, mopeds) is a tall blank and prints no stroke

The series id is lv-moped. The API returns its format, validation, colours and designs with the rest of Latvia's series:

curl -s https://vehiclesdb.com/api/v1/plates/lv \
  -H "Authorization: Bearer $VEHICLESDB_API_KEY" \
  | jq '.series[] | select(.id == "lv-moped")'