The phrase "are currently valid" is correct and usable in written English.
It can be used to indicate that something is valid at the present time or in the current context.
Example: "The rules we established last year are currently valid and must be followed by all team members."
Alternatives: "are presently valid" or "are valid at this time".
One of the limitations of the proposed method is that it is currently valid only for single-component systems.
Many, including those species that have not been reclassified are poorly known; the nomenclatural authority Index Fungorum considers only four of these former Mycenastrum species to be currently valid: Bovista bovistoides, B. lycoperdoides, Gastropila fragilis, and Glyptoderma coelatum.
M. orangiae Roberts, 1926 is the fourth species that is currently valid and missing from our dataset.
Confusingly, both statements are currently equally valid.
Some models are currently considered valid, due to many experimental confirmations; nevertheless, most of them refer to the case of cylinders in rolling mills for "flat" products, i.e. when one of the three geometrical dimensions is negligible.
Two species of Lambeosaurus are currently confirmed valid, with a third sometimes accepted.
There are currently five valid and one undescribed species of Allosaurus (A. amplus, A. atrox, A. europaeus, the type species A. fragilis, the as-yet not formally described "A. jimmadseni", and A. lucasi ). A. atrox, A. fragilis, "A.
We used unadjusted hospitalization and mortality rates as there are currently no valid age distributions at the community level available.
Biologic markers such as carcinogen-DNA adducts and oncogene activation are currently considered valid qualitative indicators of potential risk, but for most chemical exposures research is needed to establish their validity as quantitative predictors of cancer risk.
The ICHD-2 [15] diagnostic criteria were revised twice in the last few years and those that are currently recognized as valid ICHD-2RR) (Table 4) for diagnosis of Medication-overuse headache no longer require that headache resolve or revert to its previous patterns within 2 months after discontinuation of the overused medication [17].
