The annual mid-day break, which restricts outdoor work between 12:30 pm and 3:00 pm, will come into force on June 15, the Ministry of Human Resources and Emiratisation (MoHRE) announced.
It will end on September 15, the ministry added.
The summer mid-day break is now in its 21st year, and is part of the UAE's efforts to provide a safe work environment during the summer months.
Workers must have access to shaded areas during off-duty periods that has cooling equipment such as fans, sufficient access to drinking water and first-aid kits.
Those caught violating the rule will be fined AED5,000 for each person found working during the break hours and up to a maximum of AED50,000 if the case involves multiple workers.
Exceptions will apply to work that demands continuity, like asphalt mix laying and concrete pouring, and repair work that concern interruptions to water supply lines, power outages, traffic disruptions and other essential services. The exception also includes work that require a permit from a competent government authority due to their impact on traffic and public life.
Mohsen Al Nasi, Assistant Undersecretary for Inspection and Compliance Sector at the Ministry, said regular field visits will be conducted to check if companies are following the rules.
MoHRE called on community members and workers to report any violations by contacting its call centre at 600590000 or through the MoHRE app and website.

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