Access Communications Co-operative Ltd says replacing U.S. superstations with a local Canadian signal is a financial hardship and it wants the CRTC to exempt its cable systems from the current rules. The Saskatchewan-based cable co-operative has applied for an exemption from the simultaneous substitution requirements for its Class 2 systems in Estevan, Weyburn and Yorkton and its Class 1 system in Regina – PN 2001-94.