(3) A schedule Y drug. Violation of this subparagraph is a Class C crime; or

(4) A schedule Z drug. Violation of this subparagraph is a Class C crime.

For purposes of this paragraph, "school bus" has the same meaning as defined in Title 29-A, section 2301, subsection 5;

Sec. 4. 17-A MRSA §1105-D, sub-§1, ¶D, as enacted by PL 2001, c, 383, §119 and affected by §156, is amended to read:

D. At the time of the offense, the person is within 1,000 feet of the real property comprising a private or public elementary or secondary school or a safe zone as defined in section 1101, subsection 23 and the person grows or cultivates:

(1) Five hundred or more marijuana plants. Violation of this subparagraph is a Class A crime;

(2) One hundred or more but fewer than 500 marijuana plants. Violation of this subparagraph is a Class B crime;

(3) More than 5 but fewer than 100 marijuana plants. Violation of this subparagraph is a Class C crime; or

(4) Five or fewer marijuana plants. Violation of this subparagraph is a Class D crime.

Sec. 5. 30-A MRSA §3253 is enacted to read:

§3253.__Safe zones designated by municipality

A municipality may designate an area of the municipality that is frequented by minors as a safe zone under Title 17-A, section 1101, subsection 23.__A safe zone designated pursuant to this section must be conspicuously marked with an informational sign.

Sec. 6. Safe zone informational signs. The Commissioner of Public Safety shall design and make available to municipalities a safe zone informational sign under the Maine Revised Statutes, Title 30-A, section 3253.