Since material events require filing, I thought there must be a significant exemption, (having expected updates earlier).  Thought I'd run this by you to see what you think.

"However, if a company enters into a non-binding letter of intent or memorandum of understanding that also contains some binding, but non-material elements, such as a confidentiality agreement or a no-shop agreement, the letter or memorandum does not need to be filed because the binding provisions are not material." (wiki pg about 8K)

No-shop agreement
The target company involved in merger or acquisition agrees not to consider other offers while negotiating with a particular bidder
http://www.bizterms.net/term/No-shop-agreement.html

.....check for similiar terms, (as in if one term doesn't require filing, others don't either), I also liked;

Concession agreement
An understanding between a company and the host government that specifies the rules under which the company can operate locally. 
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anyway something to engage the brain and consider......will continue to abide.

GLTA