white/blue

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1967
early: "TRL" left; "SC UTILITY 67" top
later: "TRL" left; "19 UTILITY 67" bottom
blue/white

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1968
"TRL" left; "19 UTILITY 68" bottom
begin reflective letters
white/black

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1969
"TRL" left; "19 UTILITY 69" bottom
white/blue

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1970
"TRL" left; "1670 UTILITY 1970" bottom
white/green

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1971
"TRL" left; "19 UTILITY 71" bottom
white/brown

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1972
"TRL" left; "19 UTILITY 72" bottom
white/black

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1973
"TRL" left; "19 UTILITY 73" bottom
white/blue

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1974
"TRL" left; "19 UTILITY 74" bottom
white/green

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1975
"TRL" left; "19 UTILITY 75" bottom
white/maroon

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1976
"TRL" left; "1776 UTILITY 1976" top
blue/white

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1977

red/white

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1978
"TRL" left; "19 UTILITY 78" top
green/white

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1979

black/white

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1980

blue/white

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1981

red/white

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1982
"EXP UTILITY 11/30"
green/white

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1983
"EXP UTILITY 11/30"
black/white

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1984
"EXP UTILITY 11/30" top
blue/white

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1985
"UT" prefix
red/white

---

1986
"UT" prefix
green/white

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1987
"UT" prefix
black/white

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1988
early: "EXP UTILITY 11/30" bottom
later: "EXP NOV. 30 88" top
blue/white

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1989-1990
December passenger sticker; 89 non passenger sticker; 90 passenger sticker
with or without border
red/white

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1991-c.2015

passenger month/year stickers
with or without border; flat began c.2015
black/white

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c.2015-c.2016

flat version of 1991 issue, stacked "U/T" prefix

black/white

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January 1, 2016-present

standard non-passenger design, palmetto tree left

numbering began where previous version ended

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Permanent Utility (see Permanent)