The inclusion of think-tanks in the proposal was also a major win for transparency campaigners, who argued that the research bodies, which had earlier been excluded from the report, were "a major part of the lobbying community" in Brussels.
"By recognising these are key lobbying channels in Brussels, MEPs have closed an important loophole in the proposal," said Luxembourg Green MEP Claude Turmes.
These gains were largely the result of oral amendments tabled by Green MEPs, who also managed to win a requirement that lawyers be included in the register not only when their purpose is to influence policy, but also when they give legal advice, which they argued was still a form of lobbying activity.