[NTG-context] suppressing header on first page of chapter

greetings, i have setup a head for my chapters, and i would like to suppress the Chapter and Section text from being printed on the first page of each chapter. I have setup the header text like so. \setupheadertexts [text] [chapter] [section] is there a command to add to the \setuphead to make the chapter and section titles not print on the first page of the chapter (head)? thanks, mark