Soca, Scotland Yard and the Information Commissioner, Christopher Graham, have requested that none of the names on the list are published.
Mr Graham appeared before the Committee last month and is to provide an update on 8th October.
In his most recent letter, Mr Graham said:
I am concerned to avoid compromising any strands of my investigation.
In this connection, I should like to re-emphasise the continued need for the Committee not to take any further steps to publish the details of clients on the so-called Soca list.
The material relates to the period 2001 to 2009.
From material examined, I can say that in the case of 19 clients falling into the category of active there is evidence of a section 55 and/or data protection breach.
The Public Accounts Committee had threatened to release a full list of 102 of those involved.
More top news
Known as 'spice' and 'black mamba', the so-called legal high is suspected of contributing to deaths in male and female institutions.
Prince Harry will launch the countdown to the 2017 Invictus Games in Canada - as he gears up for the this year's event in Florida.
The government has announced plans to ensure staff receive tips left by customers in bars and restaurants.