Md. Code, Commercial Law § 14–3704

(a) (1) Subject to paragraph (2) of this subsection, an Internet access provider shall make a parental control that satisfies the requirements of this section available to each subscriber in the State.

(2) The Internet access provider may not be required to provide a parental control that is not reasonably and commercially available for the technology that the subscriber uses to obtain access to the Internet.

(b) A parental control shall allow the subscriber, in a commercially reasonable manner, to:

(1) Block all access to the Internet; and

(2) (i) Block a child’s access to websites by specifying prohibited websites or by selecting a category of sites to block;

(ii) Restrict a child’s access exclusively to websites that the subscriber approves or a category of websites that the subscriber approves;

(iii) Restrict a child’s access to websites that the parental control provider designates; or

(iv) Monitor a child’s use of the Internet by providing a report to the subscriber indicating:

1. Each specific website that the child has attempted to visit but was unable to view because the subscriber blocked or restricted access to the website; or

2. Each specific website that the child has visited.