に先立って => before; prior to ~ N2
に[先立「さきだ」]って/に[先立「さきだ」]ち/に[先立「さきだ」]つ => Before A occurs/takes place N2
Time, Situation
使役形 => Causative form N4
~V使役受身      => causative-passive form N4
Conjugate verbs
[使「し」][役「えき」] => Coercive, permission, allow, make N4
Causative, Passive, Volitional
[使「し」][役「えき」][受「う」]け[身「み」] => Imperative N4
Causative, Passive, Volitional
ていけない => Suddenly... N3
Simultaneously
ている => Repeat N5
Continuous
ていない => have not yet ~ N4
Trend
ていては => If one keeps doing something N3
Emphasize
ている => Already done N5
Status
ている => Already...(completed) N5
Completed