The outcome of two years' negotiations was an agreement comprising just 15 articles and one three-page annex.
aei.pitt.edu/10561/1/73639_…
And @CVCEeu have published some sources online. So too has the Archive of European Integration at @PittTweet
cvce.eu/en/recherche/u…
aei.pitt.edu/view/eusubject…
Ratification took nine months
In the UK, the House of Commons debated the agreement on 21 February 1955
api.parliament.uk/historic-hansa…
The agreement entered into force on 23 September 1955 and remained in place until the UK joined the European Communities on 1 January 1973.
The same was the case with the EEC and Euratom later in the 1950s.
Hence provisions on association were included in the Treaties of Rome with the UK in mind
ukandeu.ac.uk/research-paper…