Mediators for Uganda's civil conflict have said guerrilla leader Joseph Kony must sign a peace deal by the end of November.
They called on his Lord's Resistance Army rebels to cease all attacks.
Joseph Kony's fighters have been operating along the porous borders between Sudan and Congo since their leader failed to sign a final agreement in April with Uganda's government, aimed at ending a two-decade rebellion in the north.
The mediators did not specify what action they might take if their deadline is not met, though countries in the region have threatened a joint military operation against the LRA.
The rebels are accused of murders, kidnappings and rapes in the wider region of DR Congo, south Sudan and Central African Republic in recent months.
Mr Kony has repeatedly snubbed mediators by not showing up at pre-arranged meetings to sign the agreement, hashed out after two years of negotiations in neighbouring South Sudan.
The conflict has seen thousands of people killed and displaced nearly 2m, wreaking havoc in northern Uganda and on large tracts of central Africa.
Uganda's government warned the rebels that their leader must sign or face unspecified measures.
LRA negotiators say their fugitive chief will sign the pact eventually, but rebels will not disarm until arrest warrants by the International Criminal Court are dropped.
