Step 1: Assumption 1.
Issuing a notice presumes employees will read it \(\Rightarrow\) implicit.
Step 2: Assumption 2.
Declaring a new compulsory system presumes it helps the company (accuracy, compliance, transparency) \(\Rightarrow\) implicit.
\(\Rightarrow\) Both assumptions are taken for granted.
\(\boxed{\text{Both 1 and 2 are implicit}}\)