I saw this from an older forum post, might be the same rules apply today...
1LE/ ZL1 production temporary suspension effective Nov 21
Effective Thursday,
November 21, 2013, Chevrolet will temporarily suspend order processing for the 2014 Camaro
ZL1 model and the SS Performance Package (RPO:
1LE) due to the effect of cold weather on the performance tires for these models. Again, it is only a
temporary suspension that does not impact the Camaro LS, LT and SS models ordered without 1LE.
Order processing for the 2014 Camaro ZL1 and the SS Performance Package (RPO: 1LE) will resume on
Tuesday, February 11, 2014.
The suspension of ordering will impact Camaro production from January 2014 to March 2014. It is expected any ZL1 or SS models with the Performance Package (RPO: 1LE) produced through December 2013 will be shipped to dealers.
https://www.camaro5.com/forums/showthread.php?t=328730