Latvian license plate: Taxi (documented since 2010)

Format, years and the law

Format: LL9999, for example VE5674 (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: Taxi: for-hire vehicles where separately serialized or colored. Issued for car and van.
Colours: Characters #000000 Background #F5C400
Size: 520 × 110 mm · every country's size

Taxi 300×110 mm

taxi · 300 × 110 mm
About this plate: THE YELLOW TAXI PLATE. A CORRECTION WORTH STATING: secondary compilations give Latvian taxi plates a "TX" (or TE/TQ) series prefix. The annex prescribes only "two letters", with no reserved combination anywhere, and no CSDD page reached names one. The one thing that distinguishes a Latvian taxi mark in the string alone is nothing; it is the yellow ground that does the work.

7. pielikums 4.5.1-4.5.3, 1.4 (E type dimensions); punkts 13.5 https://likumi.lv/ta/id/222145-transportlidzeklu-registracijas-noteikumi
CSDD contrasts the taxi 'dzeltenās' plates with the general-use 'baltās' ones https://www.csdd.lv/transportlidzekla-numura-zimes/taksometru-numuru-zimes

The series id is lv-taxi. 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-taxi")'