Seniors who choose to remain in traditional fee-for-service Medicare would be offered prescription drug coverage on an optional basis. Private plans would compete to offer the drug coverage, according to the proposal, beginning in 2006. Until then, the government would authorize the use of "drug discount" cards for the purchase of prescription drugs, beginning in 2004. To receive Medicare's endorsement, card sponsors would be required to publish discounted prices, provide reliable information, and offer both retail and mail-order options.