16. Photographs. Photographs are sometimes taken within a restricted area.
If so, the photographer should be cleared for access, and he should be
escorted at all times.
Actual taking of photographs should be under the
supervision of intelligence or protective personnel. This will ensure that
classified data does not accidentally appear in the pictures. Each negative
should be secured until its first print has been carefully examined.
Examiners should be particularly alert to backgrounds.
Small parts of a
picture might reveal classified data if enlarged.
17. Contractor Employee.
Contractors usually know their key personnel.
However, it often happens that most of the employees are short time
They are unknown to their employer.
On a construction job a
large number of men will be involved over a period of time.
It is then
advisable to fence off the construction area from the rest of the post.
Where the contract work is infrequent and for short periods of time,
security may be more economical.
Each case will have to be considered
separately. A decision should be made based on the physical layout and the
sensitivity of the post. It is advisable to make local background checks on
18. Utility and Maintenance Personnel.
No group of occupations has been
used as well and as often as a cover for unauthorized entry as this one.
Correct clothing, a toolbox, and a bit of technical knowledge are the only
requirements. These people can pose as telephone repairmen, electricians or
plumbers. They can pose as business machine maintenance people. Cleaning
persons for government offices and buildings make excellent covers for
espionage and sabotage. Current espionage cases have revolved around this
type of cover-up.
Legitimate employees of public utilities and some
commercial service companies usually carry company ID.
however, not be admitted to a restricted area without at least a telephone
This can be made to their home office to establish their
Also, these persons should not be admitted without a check
with the person who requested their service.
Movement within the post
should be subject to the same pass and escort procedures as prescribed for
other visitors. Such would be the case during duty or off duty hours.