If the use of a chemical substance drops to below an annual 100 tonnes however that substance will still be listed on the List of Effects Deletion can also result from new information from the National Working Environment Authority which shows that a substance or substance group is not used in the pure form

Please fix the punctuation.
If the use of a chemical substance drops to below an annual 100 tonnes, however, that substance will still be listed on the List of Effects. Deletion can also result from new information from the National Working Environment Authority, which shows that a substance or substance group is not used in the pure form.