CHATTANOOGA, Tenn. (AP) _ A man accused of deliberately exposing four women to the AIDS virus will have to notify future sexual partners of his disease in writing and send a copy to the district attorney's office.

Richard Lewis Williams, 27, accepted those conditions as part of a plea agreement reached Tuesday. He pleaded guilty to three of four aggravated assault counts and received 15 years probation instead of jail time.

Under the plea agreement, Williams will not be able to buy a car, change jobs or move without notifying a probation officer.

''This is more of a device to give us some control in case he repeats the crime,'' Assistant District Attorney John Bobo said. ''If he does, his probation would be revoked and he'd serve prison time.''

Williams is HIV-positive. One of the four women he slept from 1990 to 1992 has tested positive for the HIV virus.

Williams admitted having unprotected sex with the women and denied having the virus when one of the women questioned him about it, Bobo said.

Tennessee law does not make knowingly exposing someone to the AIDS virus a specific crime, Bobo said. Legislation will become effective in April requiring the state Department of Health to quarantine or isolate people who deliberately expose others to communicable diseases, including AIDS.