CMS Pub. 100-01, ch. 7, § 30.50.3

A - Master Microfilm

After producing the number of copies of the microfilm required for reference purposes, the

contractor retains the master microfilm as a security file. It stores it at an offsite location so that

copies may be made in the event the reference copies are destroyed. It disposes of the master

microfilm at the time the storage facility disposes of the hardcopy contained on the film. (See

§30.30 for records disposition instructions.)

(The contractor need not maintain a master microfilm security file of records such as computer

printouts when complete computerized backup data is retained. It disposes of the master

microfilm when there is no longer a need to produce reference copies of the microfilm.)

B - Copies of Microfilm

The contractor retains one copy of the microfilm as a reference copy to be kept on site for use

when needed. It disposes of this copy with the master microfilm. (See subsection A above.)

The contractor may dispose of any other reference copies of the microfilm 2 years after the end

of the calendar year in which the documents were filmed. These copies may be retained for a

longer period if they are needed for reference purposes but not longer than the master microfilm.

C - Destruction of Microfilm

The contractor should destroy microfilm by shredding as this method provides the most complete

destruction of the data on the film. Other methods of destroying film, e.g., exposure to extreme

heat or boiling, do not eradicate the data as completely or efficiently. Shredders exist that can

destroy both film and reels. The contractor should retain cartridges or magazines which

contained the microfilm for reuse because of the high cost of replacement.

If a contractor does not have a shredder and purchase of a shredder is not cost justified, it should

check local sources such as microfilm equipment vendors, microfilm service bureaus, banks, and

insurance companies for a shredder that it can use to destroy its film. If a shredder cannot be

located, the contractor should contact its regional office for assistance.