This is the official document describing the Joint Programme that contributes to the development of an adaptive1 and universal social protection system in Saint Lucia and Barbados through integrated policy development, programme design and service implementation. The Joint Programme takes an innovative approach to modelling and piloting at community, national and sub-regional levels, which will complement national plans and leverage resources from existing policy loans from international financial institutions. The programme will utilize research, analysis, monitoring and evaluation to support the evidence-based development of an adaptive system towards progressive universal coverage of social protection, while facilitating replication and expansion  to Eastern Caribbean Countries (ECC) through South-South exchange under the OECS framework. This will also include strengthening the OECS Commission to support scale-up and sustainability of interventions and implementation across the ECC.