While headquarters staffing is to be streamlined, the staffing levels at the ports are to be maintained or increased.
( ( While ( ( headquarters staffing ) ( is ( to ( be streamlined ) ) ) ) ) ( , ( ( ( the ( staffing levels ) ) ( at ( the ports ) ) ) ( ( are ( to ( be ( ( maintained or ) increased ) ) ) ) . ) ) ) )
(ROOT (S (SBAR (IN While) (S (NP (NN headquarters) (NN staffing)) (VP (VBZ is) (S (VP (TO to) (VP (VB be) (ADJP (JJ streamlined)))))))) (, ,) (NP (NP (DT the) (NN staffing) (NNS levels)) (PP (IN at) (NP (DT the) (NNS ports)))) (VP (VBP are) (S (VP (TO to) (VP (VB be) (VP (VBN maintained) (CC or) (VBN increased)))))) (. .)))
Staffing levels at the ports are maintained or increased as headquarters' staff is streamlined. 
( ( ( Staffing levels ) ( at ( the ports ) ) ) ( ( are ( ( ( maintained or ) increased ) ( as ( ( ( headquarters ' ) staff ) ( is streamlined ) ) ) ) ) . ) )
(ROOT (S (NP (NP (VBG Staffing) (NNS levels)) (PP (IN at) (NP (DT the) (NNS ports)))) (VP (VBP are) (VP (VBN maintained) (CC or) (VBN increased) (SBAR (IN as) (S (NP (NP (NN headquarters) (POS ')) (NN staff)) (VP (VBZ is) (ADJP (JJ streamlined))))))) (. .)))