Except as provided in subsection (b) of this section, any specialty fertilizer labeled for use on turf, when applied in accordance with the instructions on the container, may not: Result in an application of: More than 0.7 pounds per 1,000 square feet of water–soluble nitrogen; or More than 0.9 pounds per 1,000 square feet of total nitrogen, at least 20% of which shall consist of slow–release nitrogen; Contain phosphorus, except: For organic and natural organic fertilizer sold to a professional fertilizer applicator; or When specifically labeled for the following purposes: Providing nutrients to specific soils and target vegetation as determined to be necessary in accordance with a soil test that was: Conducted by a laboratory identified under § 8–803.7 of this article; and Performed no more than 3 years before the application; Establishing vegetation for the first time, such as after land disturbance, provided the application is conducted in accordance with the recommended application rates established by the State; or Reestablishing or repairing a turf area; and Be labeled for use as a de–icer. An enhanced–efficiency fertilizer labeled for use on turf, when applied in accordance with the instructions on the container, may not: Result in an annual application of more than 2.5 pounds per 1,000 square feet of total nitrogen; Result in an application of more than 80% of the annual recommended rate for total nitrogen established by the University of Maryland; or Have a release rate of more than 0.7 pounds per 1,000 square feet of total nitrogen per month. Except as provided in subsections (d) and (e) of this section, a person may not offer to sell specialty fertilizer for use on turf that, when applied in accordance with the instructions on the container: Results in an application of: More than 0.7 pounds per 1,000 square feet of water–soluble nitrogen; or More than 0.9 pounds per 1,000 square feet of total nitrogen, at least 20% of which shall consist of slow–release nitrogen; and Contains phosphorus and is intended for use on turf unless the intended use of the fertilizer is: For application to specific soils and turf as determined to be necessary pursuant to a soil test conducted by a laboratory identified in § 8–803.7 of this article and performed no more than 3 years before the application, provided the application complies with recommended application rates established by the University of Maryland; For the establishment of turf for the first time, such as after land disturbance, provided the application complies with recommended application rates established by the University of Maryland; or For the reestablishment or repair of a turf area. A person may offer to sell an organic or natural organic fertilizer containing phosphorus to a professional fertilizer applicator. A person may not offer to sell enhanced–efficiency fertilizer for use on turf that: Results in an annual application of more than 2.5 pounds per 1,000 square feet of total nitrogen; Results in an application of more than 80% of the annual recommended rate for total nitrogen established by the University of Maryland; or Has a release rate of more than 0.7 pounds per 1,000 square feet of total nitrogen per month. A person may not offer to sell a commercial or specialty fertilizer product for use as a de–icer.