The congressmen told Apple that they are worried about the impact of their collected of geo-location data and the impact this could have on the privacy of Apple's consumers.
This news comes after the Los Angeles Times reported last week that the updated policy will allow Apple and unnamed third parties to collect, use and share user location data.
Apple customers will have to agree to these new terms and conditions before they are able to download any further content from the Apple iTunes store.
Apple however have said that the data will not personally identify users and will simply be used to identify behaviour patterns.
Markey and Barton have yet to receive a response from Apple but have given the company until 12 July to respond to their concerns.
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