WASHINGTON (AP) — Aiming to prevent companies from exploiting online information about children under 13, the Obama administration on Wednesday imposed sweeping changes in regulations designed to protect a young generation with easy access to the Internet.

Two years in the making, the amended rules to the decade-old Children’s Online Privacy Protection Act go into effect in July. Privacy advocates said the changes were long overdue in an era of cellphones, tablets, social networking services and online stores with cellphone apps aimed at kids for as little as 99 cents.