After reading the article, it looks as though nothing is banned quite yet. In the US, a proposal to ban the microbeads has been introduced, but has not been approved by the State and Federal jurisdictions.
Therefore, key customer should not be concerned about usage of the listed Glitterex products for the time being.
As a side note, if the ban does take place, manufacturers (Glitterex) will have to abide by the ban and produce products accordingly and would likely send out some sort of notice for our reference.