Market on cash close in FIX 4.2

Imported from previous forum

[ original email was from John Greenan - john.greenan@alignment-systems.com ]
Hi All,

I have a requirement to send Market on Cash Close futures orders to a brokker using FIX 4.2.

The curreny suggestion is to use 40=6 for these orders and have the broker map to an internal representation that covers MOCC.

Does anyone else have an elegant solution for this that does not require a change in FIX version?

Many thanks.

John