Regex to find references to legislation in a block of text

# coding=utf8
# the above tag defines encoding for this document and is for Python 2.x compatibility

import re

regex = r"(?=((?<![A-Z][a-z])(([A-Z][a-z]+[\s-][A-Z][a-z]*\s)(Act|Order))(\s\d{4})|(([A-Z][a-z]+[\s-][A-Z][a-z]+[\s-][A-Z][a-z]*\s)(Act|Order))|(([A-Z][a-z]+[\s-][A-Z][a-z]+[\s-][A-Z][a-z]+[\s-][A-Z][a-z]*\s)(Act|Order))\s\d{4}))"

test_str = "The claimant was released on licence after serving part of an extended sentence of imprisonment. Subsequently the Secretary of State revoked the claimant’s licence and recalled him to prison pursuant to section 254 of the Criminal Justice Act 2003[1] on the grounds that he had breached two of the conditions of his licence.  Police And Criminal Evidence Act 1984The Secretary of State referred the matter to the Parole Board, providing it with a dossier which contained among other things material which had been prepared for, but not used in, the claimant’s trial in the Crown Court. The material contained allegations of a number of further offences in relation to which the claimant had not been convicted, no indictment in relation to them having ever been pursued. The claimant, relying upon the guidance contained in paragraph 2 of Appendix Q to Chapter 8 of Prison Service Order 6000[2], submitted to the board that since the material contained pre-trial prosecution evidence it ought to be excluded from the dossier placed before the panel of the board responsible for considering his release. The board determined that it had no power to exclude the material and that it would be for the panel to determine questions of relevance and weight in relation to it. The claimant sought judicial review of the board’s decision and the Human Rights Act 1998. "

matches = re.finditer(regex, test_str)

for matchNum, match in enumerate(matches):
    matchNum = matchNum + 1

    print ("Match {matchNum} was found at {start}-{end}: {match}".format(matchNum = matchNum, start = match.start(), end = match.end(), match = match.group()))

    for groupNum in range(0, len(match.groups())):
        groupNum = groupNum + 1

        print ("Group {groupNum} found at {start}-{end}: {group}".format(groupNum = groupNum, start = match.start(groupNum), end = match.end(groupNum), group = match.group(groupNum)))