A family of Microsoft relational database management systems designed for ease of use.
You haven't provided any details on what triggers "permission given". I'm not sure if the permission allows any date as you state or any date up to 10 days before today as you state.
Assuming you have a text box [txtDate] on a form and want to change the validation rule you could use code like:
Private Sub cmdAllowAny_Click()
If Me.txtDate.ValidationRule <> "" Then
Me.txtDate.ValidationRule = ""
Else
Me.txtDate.ValidationRule = ">=Date()+1"
End If
End Sub