"key precondition for" is a correct and usable phrase in written English.
You can use it to describe an important requirement for something to happen. For example: "Adequate funding is a key precondition for the success of the project."
Correct positioning and differentiation of neurons during brain development is a key precondition for proper function.
A key precondition for a new approach in Afghanistan has to be an end to the west's simplistic "war on terror" rhetoric and its latest incarnation, Bush's Prague talk of "freedom versus extremism".
"The timing of this latest slump is particularly frustrating because the key precondition for a real small-business recovery — the normalization of bank lending to commercial and industrial companies — is within reach".
Formation of a surface apatite layer on scaffold struts upon soaking in SBF confirmed the excellent bioactivity of the material, which is a key precondition for in vivo osteointegration.
A key precondition for the authorization of a biocidal product is the inclusion of its active substances in the "list of permitted active substances", provided as Annex I or IA of the BPD ("positive list").
The proper development of the trophoblast lineage and uterine vessels is a key precondition for human successful pregnancy.
Ukraine's parliament last week approved a raft of IMF-backed amendments to its 2015 draft budget that were key preconditions for IMF approval of the bailout.
Strong political commitment, measures to overcome prejudices against Roma, inter-sectoral policy coordination, adequate budgets, evidence-based policies, and Roma involvement can be identified as key preconditions for improved health outcomes and well-being.
It analyses the strong and weak points of the concept of ecosystem services to this end and suggests some key preconditions for the more conscious, effective use of the concept in daily decision-making processes in land-sea complex social-ecological systems.
Our research highlights a number of features of the programme itself, as well as the broader context within which it was implemented, which are likely to undermine the development of the critical thinking and empowerment which we argue are key preconditions for programme success.
They however provide key preconditions for this compulsory testing to be ethically justified.
