Mr. Bouck. The process is continuous in that the control, for instance a White House policeman goes and picks up, when the food is picked up. But the reinvestigation is every 6 months. We take a new look at each of these establishments every 6 months to see if any change has occurred. In between times we have arrangements with Public Health to make frequent health inspections, much more frequent than an ordinary establishment would be inspected.
Representative Ford. If there is a change of an employee at one of these shops or stores, are you notified?
Mr. Bouck. We are supposed to be notified. Sometimes we aren't aware until we make the next check, although our White House policeman and our purchasing people do keep watch for this and usually we have established that only a small percentage of the people who handle White House orders, perhaps the manager and one clerk. It works quite well.
No. 8, the performance of technical and electronic inspections to protect against covert listening devices.
This is something that has been done for a great many years, the volume has gotten quite great in recent years, and we do this regularly at the White House and for the people close to the President, we do it regularly when he has stopover points on trips.
Mr. Dulles. Do you ever call the FBI in on this or do you have your own staffs to handle this detection of listening devices?
Mr. Bouck. We have our own staff but we frequently use people of other agencies, including the FBI where they have specialties or are able to perform something better than we could.
Mr. Dulles. Did you consider there is any duplication there, I mean of facilities in government?
Mr. Bouck. No; I think not. This really requires bodies, and if there is——
Mr. Dulles. And skills?