red ticket, noun phrase
Mining. A certificate of fitness which is compulsory for all miners who work underground.
1958 R.E. Lighton Out of Strong 1Yearly the underground man must pass the mine doctor to keep his red ticket. Without it he may no longer drop in clanging skip down mile-deep shaft.
1988 Personality 17 Oct. 38They have brought up four children, now all adults, and Odd even got a ‘red ticket’ certificate of health, which allowed him to work underground after they moved to Van-rhynsdorp in 1951 and he got a job on the nearby monazite mine.
A certificate of fitness which is compulsory for all miners who work underground.
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