The powers of arrest are contained within Section 28A ( 5 ) of the Immigration Act 1971 and Section 23 ( 1 ) of the UK Borders Act 2007 respectively .
DET NOUN ADP NOUN AUX VERB ADP NOUN NUM ( NUM ) ADP DET PROPN PROPN NUM CCONJ NOUN NUM ( NUM ) ADP DET PROPN PROPN PROPN NUM ADV .