The proposals made by the CLWG are organised in such a way as to encompass a number of levels of recommendation. This can be seen most clearly in the morphosyntax work.
In the synopsis phase, the CLWG has (as far as can be seen, most likely for the first time ever) tried to come up with a proposal for a set of parallel inventories of descriptive devices, for the EU languages (EAGLES, 1996g). This parallelism is highly important: work on contrastive grammars and lexicons can greatly profit from a methodology based on the construction of parallel fragments, which use, whenever possible, the same descriptive devices and isomorphic classifications. The methodology of doing this has been developed and demonstrated, in a broad coverage scenario, in the morphosyntax work of the CLWG. To be able to account for language specificities, and for the differences in granularity relevant for different languages at different levels of morphosyntactic description, a four-layered system of recommendation types has been used.
These recommendation types distinguish obligatory, recommended and optional classifications. Table 1 below describes these levels in more detail:
| Level | Information types | Recommendation types |
| L-0 | part of speech | obligatory |
| L-1 | morphosyntactic (agreement features) | recommended |
| L-2a | refined morphosyntactic features; non-morphosyntactic features; 3 or more languages | optional |
| L-2b | language-specific morphosyntactic refinement | |