The new rules are designed to allow Facebook to blend details of members activities with personal data from Instagram, the popular photo-sharing app it acquired earlier this year.
The resulting single profiles of people across multiple services could result in more accurate targeted advertising.
The Office of the Irish Data Protection Commissioner, which is most responsible for regulating Facebook in Europe because its operations are based in Dublin, now said it had asked for the proposed policy to be changed, The Telegraph reports.
It indicated that officials believe a greater level of consent to use personal data in new ways was required, and that they expected Facebook to comply.
"We have sought and received clarifications on a number of aspects and have outlined our position in relation to what consent will be required for aspects of the policy," a spokesman said.
"Facebook Ireland has understood this position and we expect the proposed data use policy to be modified to take account of these issues," he added. (ANI)