So this is my proposal, including all modifications mentioned above:
Policy for Debian's consultants page
====================================
1. Mandatory contact information
You must provide a working e-mail address and answer e-mails sent to you
within four weeks at most. You are not allowed to use your official
@debian.org address, as required by the DMUP.
2. Further contact information
If you'd like to provide an URL, please note that you cannot use an
official *.debian.org domain, according to the DMUP.
3. Multiple cities/regions/countries
Every consultant has to choose in what country (only one) they want
to be listed. They can choose only one address to be mentioned, but
they can of course mention additional cities, regions or countries on
their additional info or on their website.
Additions, modifications, and removals of entries
=================================================
If you wish to have your company added to this page, please mail the
following information to consultants@debian.org:
* Name
* Company
* Address
* Phone
* Fax
* Email
* URL
* Rates
* Additional information, if any
A request for an update of the consultant's information should be sent
to consultants@debian.org, preferably from the e-mail address mentioned
on the consultants page (http://www.debian.org/consultants).
If the above criteria are no longer met, the consultant should receive a
warning message that they are about to be removed from the listing, unless
they fulfill all criteria again. There should be a grace period of four
weeks.
Some parts (or all) of the consultant's information can be removed if
it doesn't comply with this policy anymore or on the maintainers'
discretion.