The urban guerrilla lives under the constant threat of discovery and betrayal. The primary security problems involve safe houses and an adequate guard for those houses. it is also important to make certain that the police have no way to find the urban guerrilla or his safe house.

Infiltration by a spy or informer is the greatest security threat faced by the urban guerrilla organization. Infiltrators should be killed in the same manner as deserters who inform to the police.

Effective security makes certain that the enemy cannot introduce spies or agents into our midst, and that no enemy can gain information about us even indirectly or by accident. One accomplishes effective security through careful recruiting and constant vigilance.

Nor is it important for any one revolutionary to know everything and everyone in the movement. Each person should know only what he is required to know to do his job. This rule is as fundamental to urban guerrilla security as A. B. C.

The war we wage against the enemy is arduous and difficult because it is a class struggle. Because each class is antagonistic towards the other, every class struggle evolves into a war of life or death. Since the enemy seeks to annihilate us, relentlessly pursuing his mission of search and destroy, we rely for our weapon on proper security and surprise attack.

Any guerrilla who is imprudent or lacks in class vigilance risks discovery by the enemy. No urban guerrilla should talk about himself or his comrades. Such talk might find its way to the police. The police investigate even the smallest bits of evidence, such as notes along the margins of newspapers, lost documents, calling cards, personal letters, or messages. The urban guerrilla destroys all address and telephone books, and does not write or keep in his possession incriminating papers. The organization itself should not maintain files of legal and false names of its revolutionaries, nor any biographical data, nor maps or plans. What can be memorized should not be written down.

Any urban guerrilla who violates security should be warned by his comrades. Those who repeat security violations should be removed from the movement.

Since the urban guerrilla needs to move about constantly, frequently in areas subject to police observation or in cities with effective police nets, he should adapt his security tactics to frustrate police counter-revolutionary tactics. Therefore, it is necessary to have daily intelligence on police activities, particularly on the potential of police roundups and police nets. The daily press frequently provides us with important information relating to police plans and operations.

The urban guerrilla should never, under any circumstances, allow even the slightest sign of laxity in the revolutionary organization's security measures and regulations. Guerrilla security must be continued even after the arrest of the urban guerrilla. He should reveal nothing to the police that might jeopardize the organization, nor lead to the arrest of comrades, the discovery of safe houses, other hiding places, or secret caches of arms and ammunition.