The vetting of the referendum bill appeared to alarm Beijing which issued more sharp threats of a strong reaction if a referendum bill passed which would allow a vote on sovereignty issues such as the territory and flag of the ROC. The final bill that was passed by the Legislative Yuan on 27 November 2003 did not contain restrictions on the content of any referendums, but did include very high hurdles for referendums on constitutional issues. These hurdles were largely put in place by the Pan-Blue Coalition majority in the legislature. The bill also contained a provision for a defensive referendum to be called if the sovereignty of the ROC was under threat. In response to the referendum passage, Beijing issued vague statements of unease.