CCO documents said only convert back from Lightweight mode to autonomous mode.
Q.if customer purchaced lightweight mode (P/N:LAP-XXXX) first How do they get IOS (means for autonomous mode)? CCO or should they purchase new IOS as spare?
Not sure what the Cisco licensing aspect is on buying a spare IOS AP, copying the IOS off it and using it to install on another! Especially - when the code has crypto-graphic export limitations ?
But you can get the IOS from CCO - with the correct account/support privilages!