The Canada Revenue Agency has recently revised these guides to reflect the reduction of the GST rate from 6% to 5% and the HST from 14% to 13%, which was effective January 1, 2008.
CRA RC4034
CRA RC4082
CRA RC4091
CRA Guides, RC4034, “GST/HST Public Service Bodies Rebate”, RC4082, “GST/HST Information for Charities” and RC4091, “GST/HST Rebate for Partners”