Online Access to Materials Harmful to Minors; Requiring a developer to, beginning on a specified date, make specific determinations about covered applications, provide notice to application stores about such applications, and provide certain features for parents to protect a user that is a child; requiring a covered manufacturer to, beginning on a specified date, take certain steps to determine specified information about the user, provide certain notices, and provide developers of covered applications with a specified means to verify the age of a user; providing requirements for devices sold before a specified date; providing construction, etc.