UPDATE 2-Facebook tightens privacy to satisfy Irish regulator

* Facebook mostly complies with review - Irish watchdog

* Deadline of 4 weeks given for outstanding issues

* Facebook sees no impact on advertising strategy

DUBLIN, Sept 21 (Reuters) - Facebook Inc has

tightened up its privacy controls sufficiently to satisfy a

review by the body that regulates the social networking company

outside North America, removing the immediate threat of legal

challenges.

The world's biggest social network makes most of its money

from advertising, but has to walk a fine line to avoid giving

its over 950 million users the impression it is invading their

privacy to boost revenue.

It was told by Ireland's Data Protection Commissioner last

December to overhaul privacy protection for its users outside

the United States and Canada after a probe found its privacy

policies were too complex and lacked transparency.

The regulator said it was particularly encouraged by the

decision to turn off a piece of facial recognition technology,

the so-called "tag suggest" feature, for new users in the

European Union and by next month, existing users as well.

The Irish watchdog, which oversees Facebook's activities

because the group's non-U.S. business is headquartered in

Dublin, said on Friday most of its instructions had been

adopted, with progress still to be made on others over the next

four weeks.

"We would hope that the progress reported in the review will

have dealt with the various complaints we have received in

relation to Facebook Ireland," Ireland's Data Protection

Commissioner Billy Hawkes told a conference call.

Privacy cases can prove costly for social networking sites

like Facebook, which was the first American company to debut

with a value of more than $100 billion in its initial public

offering in May, before its share price slumped on an uncertain

outlook.

PRIVACY RIGHTS

It had to settle a case for $9.5 million after its now

defunct "Beacon" service violated its members' privacy rights by

not requiring their consent to allow the company to broadcast

their internet activity.

Ireland's watchdog had said the company risked facing legal

action under European privacy laws if it failed to comply and

said on Friday the social network would have to continue to

engage with it as new features are introduced.

In its report, the regulator said Facebook had made

particular progress in providing better transparency for its

users, handing them more control over settings and the ability

to more readily access their personal data.

Facebook's director of policy for Europe, the Middle East

and Africa Richard Allan told Reuters the company was committed

to bringing the tag suggest feature back once it had taken steps

to put it in line with EU guidance.

Allan said the move should also remove the threat of legal

action from Germany's Hamburg Data Commissioner over the

facial-recognition feature.

"Clearly the announcement today means we think there are no

grounds for them to proceed with that," Allan said, adding that

Facebook's privacy changes would have no impact at all on its

advertising strategy.

Pivotal Research Group analyst Brian Wieser agreed that

Facebook's advertising business and its ability to let marketers

aim pitches at different groups of users would not be affected.

"They could probably have a lot less data and it would still

dwarf other comparable alternatives," he said. "They'll still

be able to target better than others."

The regulator said the outstanding areas of concern included

minimising the potential for advertising to target users based

on words that could be considered as sensitive personal data,

but both it and Facebook said they were confident that these

issues would be dealt with speedily.

An Austrian-based group of student activists,

europe-v-facebook, which has succeeded in extracting some

concessions on privacy from Facebook, said the law had been

waived for the tech group.

"The Irish ODPC says that Facebook has not fully implemented

the suggestions and that further work has to be done, but there

seem to be no consequences or fines for not complying with these

suggestions," said the group in a statement.