Certain object types, including ACIS solids and regions, are not documented.

Certain types of large random satisfiable instances of SAT can be solved by survey propagation ( SP ).

Certain types of rules or customs may become law and regulatory legislation may be introduced to formalize or enforce the convention ( for example, laws that define on which side of the road vehicles must be driven ).

Certain types of folk music are also called world music.

Certain types of seafood, such as shellfish, crustaceans, and eels, are therefore considered non-kosher.

* Certain types of pleated wrapover skirt worn as school uniform by girls.

Certain types of chondrites also contain small amounts of organic matter, including amino acids, and presolar grains.

Certain types of venom, such as those produced by venomous snakes, can also cause proteolysis.

Certain HPV types, in particular types 16 and 18, can also lead to progression from a benign wart to low or high-grade cervical dysplasia, which are reversible forms of precancerous lesions.

Certain types of world lines ( called geodesics of the spacetime ) are the shortest paths between any two events, with distance being defined in terms of spacetime intervals.

* Certain types of nonwoven fabric are referred to as " SMS ", because they superimpose spun layers on melted layers on more spun layers

Certain types of cable car are also known as trams.

Certain types of flint, such as that from the south coast of England, contain trapped fossilised marine flora.

Certain types of churches may in certain circumstances excommunicate the apostate, while some religious scriptures demand the death penalty for apostates.

Certain types of sea slugs, such as the nudibranch aeolids, are known to undergo kleptocnidae ( in addition to kleptoplasty ), whereby the organisms store nematocysts of digested prey at the tips of their cerata.

Certain types of encryption, by their mathematical properties, cannot be defeated by brute force.

Certain cell types such as fat and muscle cells require insulin to absorb glucose.

* Certain categories of character types in role-playing games are called splats, and the game supplements describing them are called splatbooks.

Certain types of goods are exempt from duty regardless of source.

Certain types of vibrato, then, were seen as an ornament, but this does not mean that it was used sparingly.

Certain countries classify sausage types according to the region in which the sausage was traditionally produced:

Certain sausages also contain ingredients such as cheese and apple, or types of vegetable.

Certain types of bananas ( the types that ripen in three months ) grow well during the summer.

Willard Thorp, in his new book, American Writing In The Twentieth Century, observes, quite validly it seems: `` Certain subjects are conspicuously absent or have been only lightly touched.

Certain other deductions are not allowed in determining Adjusted Gross Income.

Certain pianistic traits are common to all five Schnabelian renditions, most notably the `` Schnabel trill '' ( which differs from the conventional trill in that the two notes are struck simultaneously ).

Certain other properties of small particles, in addition to those already mentioned in connection with penetration of the respiratory tract, are noteworthy in defense considerations.

Certain badly disillusioned market critics are often apt to feel that there is something somehow unfair, dirty, or even thoroughly criminal about this interplay of competitive forces.

Certain specific conditions are excluded as disabilities, such as current substance abuse and visual impairment that is correctable by prescription lenses.

Certain indigenous religious groups such as the Australian Aborigines are more typically totemic, whereas others like the Inuit are more typically animistic in their worldview.

Certain stones, when examined in thin sections by transmitted light, show a diffraction spectrum due to the extreme delicacy of the successive bands, whence they are termed rainbow agates.

Certain natural substances are reputed to have anxiolytic properties, including the following:

Certain international trade laws, such as those on intellectual property, are also enforced in India.

Certain other state agencies enjoy considerable operational independence and autonomy ; they include the electrical power, the nationalized commercial banks ( which are open to competition from private banks ), and the social security agency.

Certain elements have no stable isotopes and are composed only of radioactive isotopes: specifically the elements without any stable isotopes are technetium ( atomic number 43 ), promethium ( atomic number 61 ), and all observed elements with atomic numbers greater than 82.

Certain people are known even to people unfamiliar with the area in which they excelled.

Certain Jewish thinkers, such as Maimonides, believed that concubines are strictly reserved for kings, and thus that a commoner may not have a concubine ; indeed, such thinkers argued that commoners may not engage in any type of sexual relations outside of a marriage.

Certain sub-castes are shunned more than others.

Certain Latin-Rite Catholic priests may receive a dispensation to be married before ordination, and all Eastern Catholic priests outside the United States are also permitted to be married, provided they are so before ordination.

Certain drawing methods or approaches, such as " doodling ," other informal kinds of drawing, and the surrealist method of " entopic graphomania ", in which dots are made at the sites of impurities in a blank sheet of paper, and lines are then made between the dots, may or may not be considered part of " drawing " as a " fine art ".

Certain forms of the gene are associated with a mild form of epilepsy.

Certain aspects of XP have changed since the book Extreme Programming Refactored ( 2003 ) was published ; in particular, XP now accommodates modifications to the practices as long as the required objectives are still met.