The latest proposed draft of the Do Not Track specification published Wednesday requires that users must choose to turn on the anti-behavioral tracking feature in their browsers and software.
Microsoft IE 10, which the company announced last week, will have Do Not Track turned on by default, and thus won’t be compliant with the official spec. Which means that tech and ad companies who say they comply with Do Not Track could simply ignore the flag set by IE 10 and track those who use that browser, which means Microsoft has no choice but to change the setting.
Microsoft’s surprise announcement last Thursday was interpreted by many as a way to gouge Google, which runs an ad system based on tracking cookies. But it also enraged many online ad companies and industry groups, who saw the move as overly aggressive and a threat to their business model.
The new draft specification (.pdf), which is being worked out by a group of privacy advocates, browser makers, technology firms and online ad companies, now states:
Explicit Consent Requirement
Note: This section was recently added and has not been extensively discussed with stakeholders. Please consider it a preliminary position.
An ordinary user agent MUST NOT send a Tracking Preference signal without a user’s explicit consent.
Example: The user agent’s privacy preferences pane includes controls for configuring the Tracking Preference signal.
Example: On first run, the user agent prompts the user to configure the Tracking Preference signal.
If that’s not clear enough, a summary of a working group conference call today sent out later Wednesday made the change clearer:

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