HMRC (Her Majesty's Revenue and Customs) and FCA (the Financial Conduct Authority) place us in the UK: the are the two main UK financial regulatory authorities.

EDD is enhanced due diligence. It refers to a more stringent form of customer due diligence, which means "taking steps to identify your customers and checking they are who they say they are". The main reason for due diligence in this context is to guard against money laundering. Enhanced due diligence is for situations where there's a higher risk of money laundering or other illegal activity:

"In some situations you must carry out ‘enhanced due diligence’. These situations are:
- when the customer isn’t physically present when you carry out identification checks
- when you enter into a business relationship with a ‘politically exposed person’ - typically, a non UK or domestic member of parliament, head of state or government, or government minister and their family members and known close associates
- when you enter into a transaction with a person from a high risk third country identified by the EU
- any other situation where there’s a higher risk of money laundering.
The enhanced due diligence measures for customers who aren’t physically present and other higher risk situations include:
- obtaining further information to establish the customer’s identity
- applying extra measures to check documents supplied by a credit or financial institution
- making sure that the first payment is made from an account that was opened with a credit institution in the customer’s name
- finding out where funds have come from and what the purpose of the transaction is"
https://www.gov.uk/guidance/money-laundering-regulations-you...

The meaning of the term is essentially the same in the US:

"Enhanced due diligence (EDD) is a more detailed standard required for larger customers and transactions."
https://en.wikipedia.org/wiki/Know_your_customer#Enhanced_du...

"Enhanced Due Diligence for Higher-Risk Customers
Customers that pose higher money laundering or terrorist financing risks present increased exposure to banks; due diligence policies, procedures, and processes should be enhanced as a result."
https://www.ffiec.gov/bsa_aml_infobase/pages_manual/olm_013....


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Note added at 6 hrs (2017-10-28 06:47:05 GMT)
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I should have said that the FCA is the regulatory body for the financial services industry and that HMRC is the government department that administers and collects taxes, though crucially, in this context, HMRC also administers anti-money laundering registrations, so it that sense it does have a regulatory function. That is why the text refers to "license terms with HMRC".