BRUSSELS, Nov 4 (Reuters) - EU antitrust regulators will

assess whether Apple's ( AAPL ) operating system for iPads

comply with the bloc's landmark rules aimed at reining in the

power of Big Tech, the European Commission said on Monday.

The move by the EU executive, which acts as the bloc's

competition enforcer, followed Apple's ( AAPL ) publication of a

compliance report for its iPad OS, designated by the commission

in April as an important gateway for businesses to reach their

customers.

"The Commission will now carefully assess whether the

measures adopted for iPad OS are effective in complying with the

DMA obligations," the EU antitrust watchdog said in a statement.

"The Commission's assessment will also be based on the input

of interested stakeholders," it said.

Apple ( AAPL ) did not immediately respond to request for comment

The Digital Markets Act (DMA), which came into force earlier

this year, requires Apple ( AAPL ) to allow users to set the default web

browser of their choice on iPads, permit alternative app stores

on its operating system and allow headphones and smart pens to

access iPad OS features.

DMA breaches can cost companies fines as much as 10% of

their global annual turnover.

(Reporting by Sudip Kar-Gupta; editing by Mark Heinrich and

Emelia Sithole-Matarise)