The March 11th approval is about a rule change that allows such ETFs to be listed on Bats. It does not, however, approve the COIN ETF to be listed. These are two separate documents that require approval:

Rule change: http://cdn.batstrading.com/resources/regulation/rule_filings/pending/2016/SR-BatsBZX-2016-30.pdf

COIN ETF: https://www.sec.gov/Archives/edgar/data/1579346/000119312517034708/d296375ds1a.htm