▁U . S . ▁Im m igration ▁and ▁Custom s ▁En for cement ▁Director ▁of ▁U . S . ▁Cit iz ens hip ▁and ▁Im m igration ▁Services ▁Ass istant ▁Secretary ▁for ▁Policy ▁General ▁Coun sel ▁of ▁the ▁Department ▁of ▁Hom eland ▁Security ▁Deput y ▁Under ▁Secretary ▁for ▁Management ▁Deput y ▁Commission er ▁of ▁U . S . ▁Custom s ▁and ▁Border ▁Prote ction ▁Deput y ▁Administr ator ▁of ▁the ▁Transport ation ▁Security ▁Administration ▁Deput y ▁Director ▁of ▁U . S . ▁Im m igration ▁and ▁Custom s ▁En for cement ▁Deput y ▁Director ▁of ▁U . S . ▁Cit iz ens hip ▁and ▁Im m igration ▁Services ▁Director ▁of ▁the ▁Federal ▁Law ▁En for cement ▁Training ▁Center ▁ ▁The ▁April ▁ 1 0 , ▁ 2 0 1 9 ▁update ▁to ▁the ▁D HS ▁Or ders ▁of ▁Su cc ession , ▁made ▁purs u ant ▁to ▁the ▁Hom eland ▁Security ▁Act ▁of ▁ 2 0 0 2 , ▁provided ▁a ▁different ▁order ▁in ▁the ▁case ▁of ▁un av ail ability ▁to ▁act ▁during ▁a ▁dis aster ▁or ▁cat ast roph ic ▁emer gency : ▁▁ ▁Deput y ▁Secretary ▁of ▁Hom eland ▁Security ▁▁ ▁Under ▁Secretary ▁for ▁Management ▁▁ ▁Commission er ▁of ▁U . S . ▁Custom s ▁and ▁Border ▁Prote ction ▁▁ ▁Administr ator ▁of ▁the ▁Federal ▁Emer gency ▁Management ▁Agency ▁▁ ▁Director ▁of ▁the ▁Cy ber security ▁and ▁In frastr ucture ▁Security ▁Agency ▁▁ ▁Under ▁Secretary ▁for ▁Science ▁and ▁Technology ▁▁ ▁Under ▁Secretary ▁for ▁Int elligence ▁and ▁Analysis ▁▁ ▁Administr ator