に[基「もと」]づいて/に[基「もと」]づき/に[基「もと」]づく => Based on A N2
Based, Focused, Depending on
[際「さい」]して/に([際「さい」]し)/に[際「さい」]しての => At the time of A (which starts now).. N2
Time, Situation
[合「あ」]う => To do A together/mutually N4
Secondary Verb