Decision Diagnostics Corp (DECN)

[loanranger]

"Why don't the actual changes have to be revealed?"
They do. The following are OTCMarkets versions of the SEC Reporting Company 8-K filing requirements (highlight mine):

"If not included in the issuer’s previous public disclosure documents or if any of the following events occur after the publication of such disclosure documents, the issuer shall publicly disclose such events by disseminating a news release within 4 business days following their occurrence, and posting such news release through the OTC Disclosure & News Service.
Material corporate events include:
• Entry or Termination of a Material Definitive Agreement
• Completion of Acquisition or Disposition of Assets, Including but not Limited to mergers
• Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of an Issuer
• Triggering Events That Accelerate or Increase a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement
• Costs Associated with Exit or Disposal Activities
• Material Impairments
• Sales of Equity Securities
• Material Modification to Rights of Security Holders
• Changes in Issuer's Certifying Accountant
• Non-Reliance on Previously Issued Financial Statements or a Related Audit Report or Completed Interim Review
• Changes in Control of Issuer
• Departure of Directors or Principal Officers; Election of Directors; Appointment of Principal Officers
• Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year
• Amendments to the Issuer's Code of Ethics, or Waiver of a Provision of the Code of Ethics
• Other events the issuer considers to be of importance"

I'm having trouble linking it but the above is excerpted from the OTC Pink® Basic Disclosure Guidelines...I'm sure you can find them.
But OTCMarkets doesn't monitor filings with the Departments of State (in fact they don't monitor much of anything) so there are no real repercussions for DECN's failure to "publicly disclose such events by disseminating a news release within 4 business days following their occurrence, and posting such news release through the OTC Disclosure & News Service".