What follows is an opinion from the Supreme Court of the United States. Your task is to determine the issue of the Court's decision. Determine the issue of the case on the basis of the Court's own statements as to what the case is about. Focus on the subject matter of the controversy rather than its legal basis.

PITTSBURGH TOWING CO. v. MISSISSIPPI VALLEY BARGE LINE CO. et al.
No. 319.
Decided November 7, 1966.
Ernie Adamson for appellant.
Arthur L. Winn, Jr., Samuel H. Moerman, J. Raymond Clark and James M. Henderson for appellees.
Per Curiam.
The motion to dismiss is granted for failure of appellant to comply with the time requirement of Rule 13 (1) of the Rules of this Court in docketing its appeal. This appeal was docketed 22 days after expiration of the 60-day period provided by the Rule. During that period, appellant made no application for an enlargement of time, either to the District Court or to a Justice of this Court (see Rule 13 (1)), nor did any explanation accompany the untimely docketing of the appeal. The jurisdictional statement itself is silent on the subject. Not until appellee moved to dismiss pursuant to Rule 14 (2) did appellant comment upon its default. Its reply to the Motion to Dismiss states that the “delay was occasioned by a misunderstanding between Counsel for appellant.” It does not elaborate.
This Court has been generous in excusing errors of counsel, but if there are to be rules, there must be some limit to our willingness to overlook their violation. While we are inclined to be generous in exercising our discretion to forgive a mistake and waive the consequences of negligence, fairness to other counsel and to parties with business before the Court as well as due regard for our own procedures leads us to believe that this case does not warrant our indulgence.

Question: What is the issue of the decision?
01. comity: civil rights
02. comity: criminal procedure
03. comity: First Amendment
04. comity: habeas corpus
05. comity: military
06. comity: obscenity
07. comity: privacy
08. comity: miscellaneous
09. comity primarily removal cases, civil procedure (cf. comity, criminal and First Amendment); deference to foreign judicial tribunals
10. assessment of costs or damages: as part of a court order
11. Federal Rules of Civil Procedure including Supreme Court Rules, application of the Federal Rules of Evidence, Federal Rules of Appellate Procedure in civil litigation, Circuit Court Rules, and state rules and admiralty rules
12. judicial review of administrative agency's or administrative official's actions and procedures
13. mootness (cf. standing to sue: live dispute)
14. venue
15. no merits: writ improvidently granted
16. no merits: dismissed or affirmed for want of a substantial or properly presented federal question, or a nonsuit
17. no merits: dismissed or affirmed for want of jurisdiction (cf. judicial administration: Supreme Court jurisdiction or authority on appeal from federal district courts or courts of appeals)
18. no merits: adequate non-federal grounds for decision
19. no merits: remand to determine basis of state or federal court decision (cf. judicial administration: state law)
20. no merits: miscellaneous
21. standing to sue: adversary parties
22. standing to sue: direct injury
23. standing to sue: legal injury
24. standing to sue: personal injury
25. standing to sue: justiciable question
26. standing to sue: live dispute
27. standing to sue: parens patriae standing
28. standing to sue: statutory standing
29. standing to sue: private or implied cause of action
30. standing to sue: taxpayer's suit
31. standing to sue: miscellaneous
32. judicial administration: jurisdiction or authority of federal district courts or territorial courts
33. judicial administration: jurisdiction or authority of federal courts of appeals
34. judicial administration: Supreme Court jurisdiction or authority on appeal or writ of error, from federal district courts or courts of appeals (cf. 753)
35. judicial administration: Supreme Court jurisdiction or authority on appeal or writ of error, from highest state court
36. judicial administration: jurisdiction or authority of the Court of Claims
37. judicial administration: Supreme Court's original jurisdiction
38. judicial administration: review of non-final order
39. judicial administration: change in state law (cf. no merits: remand to determine basis of state court decision)
40. judicial administration: federal question (cf. no merits: dismissed for want of a substantial or properly presented federal question)
41. judicial administration: ancillary or pendent jurisdiction
42. judicial administration: extraordinary relief (e.g., mandamus, injunction)
43. judicial administration: certification (cf. objection to reason for denial of certiorari or appeal)
44. judicial administration: resolution of circuit conflict, or conflict between or among other courts
45. judicial administration: objection to reason for denial of certiorari or appeal
46. judicial administration: collateral estoppel or res judicata
47. judicial administration: interpleader
48. judicial administration: untimely filing
49. judicial administration: Act of State doctrine
50. judicial administration: miscellaneous
51. Supreme Court's certiorari, writ of error, or appeals jurisdiction
52. miscellaneous judicial power, especially diversity jurisdiction
Answer: