Locate Required changes

Imported from previous forum

[ original email was from Michael Timpone - mtimpone@bloomberg.net ]
Couple of questions regarding RegSho Locate rules.
Is there a common implementation for the user defined tags 5700 and 5701.
I am under the impression that 5700 will be the MPID of the dealer.
Is there an instance where the bank doing the loan will not have an MPID and if so what should/will be passed in 5700. What format is used.
Is there any standard for the locate ID. What format is typically being supported.
Lastly, are there any further meetings planned to assess if this has been widely implemented and how and if it is being enforced.
It seems too loosely defined and I want to avoid doing work now only to find later that we need to support more characters etc.

FPL’s Americas Regional Committee’s Business Practices Sub-committee had published a 3-page document providing guideline for using FIX to comply with Reg. SHO rules. The pdf document can be found here:
http://www.fixprotocol.org/documents/1004/FPL%20Americas%20REG%20SHO%20(2).pdf

(or via the “News and Publications” link and look for the document titled “Guidance on Regulation SHO”)

Couple of questions regarding RegSho Locate rules. Is there a common
implementation for the user defined tags 5700 and 5701. I am under the
impression that 5700 will be the MPID of the dealer. Is there an
instance where the bank doing the loan will not have an MPID and if so
what should/will be passed in 5700. What format is used. Is there any
standard for the locate ID. What format is typically being supported.
Lastly, are there any further meetings planned to assess if this has
been widely implemented and how and if it is being enforced. It seems
too loosely defined and I want to avoid doing work now only to find
later that we need to support more characters etc.