Most of the provinces that do not have one of those destination cities have implemented strategies to try to boost their share of immigration. While cities are a popular destination for new immigrants, some small towns have seen an influx of immigration due to economic reasons and local schools districts are working to adjust to the change. According to Immigration, Refugees and Citizenship Canada, under the Canada–Quebec Accord of 1991, Quebec has sole responsibility for selecting most immigrants destined to the province. However, once immigrants are granted permanent residency or citizenship they are free to move between and reside in any provinces under Section 6 of the Canadian Charter of Rights and Freedoms. Within cities, immigrants are more likely to settle in areas with better public transit service compared to non-immigrants, and are more likely to use public transit for travelling to work, partly because of costs and barriers to car ownership Illegal migration Estimates of undocumented immigrants in Canada range between 35,000 and 120,000. James Bissett, a former head of the Canadian Immigration Service, has suggested that the lack of any credible refugee screening process, combined with a high likelihood of ignoring any deportation orders, has resulted in tens of thousands of outstanding warrants for the arrest of rejected refugee claimants, with little attempt at enforcement. A 2008 report by the Auditor General Sheila Fraser stated that Canada has lost track of as many as 41,000 illegal immigrants. In August 2017, the border between Quebec and New York, most notably the former Roxham Road port of entry, saw an influx of up to 500 crossings each day outside of official ports of entry by people seeking asylum in Canada. Entering Canada outside of a port of entry is not an offence under either the Criminal Code or Immigration and Refugee Protection Act, and regulations under the IRPA only require that a person seeking to enter Canada outside a point of entry to "appear without delay" at the nearest port of entry. While entering Canada outside of a port of entry may represent an unlawful act, section 133 of the Immigration and Refugee Protection Act requires that charges related to any offences associated with entering Canada are stayed while an entrant's claim is being processed in accordance with the Convention Relating to the Status of Refugees. As result, Canada increased border patrol and immigration staffing in the area, reiterating that