Table 1. Strengths of recommendation.
| Recommendation strength | Syntax |
|---|---|
| Strong recommendation | shall |
| Recommendation | should |
| Recommendation open | may |
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.