"may seldom be" is a correct and usable phrase in written English.
It is typically used to describe something that rarely or infrequently happens. Example: "The opportunity to travel abroad may seldom be available for students on a tight budget."
These laws may seldom be applied, but they could be.
Grading of Recommendations Assessment, Development and Evaluation (GRADE) guidance warns against strong recommendations when confidence in effect estimates is low or very low, suggesting that such recommendations may seldom be justified.
In real life this manifestation of trust in the rest of the human race may seldom be rewarded, but this being a romantic comedy, after many travails, it is.
An offense may seldom be prosecuted but still illegal.
While that may seldom be the case, the vast majority of the charges this blogger has read or heard toward Ms. Clinton are neither sexist nor rooted in hatred.
In practice, an accurate estimate of conception date may seldom be available outside the setting of in vitro fertilization.
Possibly only Mr Newby could notice, while treading water off the east coast of Sicily in 1942 and trying to avoid being shot at by Germans, that the plume of smoke over Etna looked like the quill of a pen stuck in a pewter ink-pot.Well-equipped he may seldom have been, but he was usually well-dressed.
From the knowledge management point of view another problem of machine learning algorithms may arise: the "learned" knowledge can seldom be imported or exported in a human-readable way.
While they may become infected, they seldom are killed by the fungus.
Lead, which may easily decay, has seldom been used for coinage, except by the Andhras (inhabitants of the Deccan in ancient India), in pre-Roman Gaul, and in the more recent coinages of the Malay states.
Baseline data collected in the pilot also confirmed previous findings that, without facilitation, case conferences may seldom occur and/or be of poor quality [ 36, 37].
