Which of the following is true concerning access to frequencies?

According to FCC rules, all amateur frequencies are shared. No single operator or group has a 'right' to a specific frequency, regardless of how long they have been there, whether they are running a scheduled net, or if they are participating in a contest. The only exception to this rule is during a declared emergency, where emergency communications have absolute priority. At all other times, operators must cooperate and share the spectrum amicably. Distractors like 'Nets have priority' or 'QSOs in progress have priority' are common myths heard on the bands, but they have no legal standing. Good amateur practice dictates mutual respect and flexibility when frequency conflicts occur.