For the frequency-agile upgraded Arecibo Telescope, there are bands where Radio Astronomy has either no regulatory protection, only a "secondary" status or, at best, a "shared-primary" status. In these bands, observations can only be carried out either by utilizing RFI-excision techniques or in coordination with other users. This will open a page from the March 98 issue of the NAIC/AO Newsletter that describes the current measures taken to avoid RFI in the new wide-band L-band receiver. ...