VMS Help FORTRAN, Statements, Type declaration  *Conan The Librarian (sorry for the slow response - running on an old VAX)

  A type declaration can be specified only once and must precede all
  executable statements.  A type declaration cannot change the type
  of a symbolic name that has already been implicitly assumed to be
  another type.

  Type declarations must precede all executable statements, can be
  declared only once, and cannot be used to change the type of a
  symbolic name that has already been implicitly assumed to be
  another type.

  Type declaration statements can initialize data in the same way as
  the DATA statement:  by having values, bounded by slashes, listed
  immediately after the symbolic name of the entity.

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