task Billable defaults get overwritten

task Billable defaults get overwritten

Hi Folks,
when I set a project or a task to non-billable. The time entry form overrides it to whatever the default is for the timesheet (I set mine to billable). Is there a way, if the task has a specific billable/non-billable set, to just let that be the default??
We have tasks that are only ever classed as non-billable and it's a pain to continually alter the time requests appropriately !

thanks,
John.