The Health and Safety Executive (HSE) said it had accepted the safety case for the Elgin platform, which is owned by a subsidiary company of Total.
The site, about 150 miles east of Aberdeen, was evacuated when it started leaking gas last March.
Gas production can resume from an installation in the North Sea that was evacuated after a "significant" leak last year.
The Health and Safety Executive (HSE) said it had accepted the safety case for the Elgin platform, which is owned by a subsidiary company of Total.
The site, about 150 miles east of Aberdeen, was evacuated when it started leaking gas last March.
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