All carpet sold in the state shall be manufactured with the following minimum amounts from post-consumer sources:

1. 1. within one year after the plan is approved by the department pursuant to section 27-3309 of this title, a minimum of ten percent post-consumer content;
2. 2. within four years thereafter, a minimum of twenty percent post-consumer content; and
3. 3. five years thereafter, a minimum of thirty percent post-consumer content.